Gwen Stefani emailed husband Gavin Rossdale to tell him she was pregnant.
The 'Hollaback Girl' singer - who has been married to the rocker for 12 years - informed her musician beau about the conception of their third child, Apollo, through the internet messaging medium because she thought it was the only viable way due to their busy schedules.
Gavin told SiriusXM radio station: "I got this email on the road, from Gwen, and the title was in capitals, 'LOOK WHAT YOU DID TO ME NOW',
"I was like, 'What is this?' My blood pressure went through the roof. And I opened the email, and it was the pregnancy stick."
The Bush frontman also admitted he knew exactly when Apollo was conceived - during a rare break away from touring.
He joked: "I wasn't home that often, but I did go home for Father's Day ... And that gives Father's Day a new meaning."
Presenter Howard Stern then admitted he was surprised when news of Gwen's pregnancy emerged last year as he thought the couple were "done" having children. Gavin joked: "Me too!".
Gwen, 44, gave birth to Apollo in February adding to their brood of Kingston, eight, and Zuma, six. Gavin also has another child, 25-year-old model Daisy Lowe, from a previous relationship.

Britney Spears is on the dating app Tinder.
The 'Toxic' songstress shocked 'The Tonight Show' viewers who weren't expecting an appearance from the blonde beauty on Tuesday (08.09.14), but it was the host who managed to surprise everyone, after he announced to an unwitting Britney that he had created an online dating profile for her.
The newly single singer broke up with her long-term partner David Lucado in August, but she was in good spirits as presenter Jimmy Fallon joked about the app - which allows users to approve potential dates by flicking through their profile photos - and even took part in a 'Dating Pros and Cons' segment on the show.
When asked if she was excited to be on the dating app, Britney sarcastically said: "Oh yeah, I'm thrilled."
The duo then started their skit, which included references to Britney's pop career and her new lingerie line.
Talking about the pros to dating Britney, Jimmy said: "'I'm Not a Girl, Not Yet a Woman' is a great song."
The 32-year-old pop star quipped: "It's also Jimmy Fallon's yearbook quote."
He then praised Britney's new business venture, saying: "Today she released a brand-new sleepwear/lingerie line called, 'The Intimate Britney Spears', and it can be worn by anyone."
The singer then grimaced as she added: "Jimmy's wearing it under his suit right now."

Ed Sheeran is addicted to chocolate bars.
The 'Nina' hitmaker insists he is getting fat because he cannot stop himself from gorging on the calorific treats - and he has even started eating two of the sweet treats a day for his breakfast.
He said: "I'm eating so many chocolate bars, it's crazy.
"It makes me really happy but it's also making me chubby too.
"I mean, I even eat a few bars for my breakfast, it's just so easy to eat."
However, the 23-year-old singer is trying to cut down on his penchant for chocolate.
He is quoted by the Daily Star newspaper as saying: "I really need to stop my obsession."
Ed's latest obsession comes after he revealed earlier this year he doesn't go out much, preferring to stay in and gorge on chocolate while he is watching episodes of reality TV show 'The Only Way is Essex'.
He said: "I tend not to go out much now and I've turned into a bit of a recluse.
"I will sit at home doing nothing, just eating chocolate and watching TOWIE.

Harper Beckham chooses which shoes her father David Beckham should wear with his outfits.
The former footballer has revealed his three-year-old daughter is already following in the footsteps of her fashion designer mother Victoria Beckham by suggesting which items of clothing he should sport on a daily basis.
He said: "She'll come in and she'll want to put my belt on or she'll dress me or she'll say, 'Daddy, wear these shoes with that.' It's amazing."
While the youngster seems to have no problem deciding what the 39-year-old hunk should wear every day, he admits she is not quite as decisive when it comes to her own garments.
Speaking on ITV morning show 'Lorraine', David - who also has sons, Brooklyn, 15, Romeo, 12 and nine-year-old Cruz with Victoria - said: "That started a year ago, she would get up in the morning and she'd pull her wardrobe open and take a good 20 minutes to decide what to wear and then she'd change her mind. I'm not used to that!
"We've obviously got three boys who will stick on anything and they're happy. Apart from the middle one, Romeo's a bit more selective.
"With Harper she changes her mind all the time. I've heard all little girls are like this. It's amazing to watch."
Harper is not the only Beckham child who has a keen eye for fashion as her older brother Brooklyn went along to support his mother at the Mercedes-Benz Fashion Week Spring/Summer 2015 fashion show in New York on Sunday (07.09.14).
The teenager sat alongside dad David in the front row and the former England captain admitted his son had a great time at the event.
He said: "He seemed to enjoy it, he was definitely looking at the clothes and obviously the girls walking around - he loved it.
"He's really proud of what his mum has achieved as well and Victoria is even more proud to have him sat in the front row of the show."

Michael Douglas' son is set to be released early from prison.
Cameron Douglas, 35 - who is currently serving time at Cumberland FCI in Pennsylvannia for possession of crystal meth and cocaine with intent to distribute - is believed to be getting out a year earlier than his expected 2018 release date on March 18 2017, according to prison reports viewed by RadarOnline.com.
Cameron - who has been in jail since 2009 - is the 'Wall Street' star's only child from his first marriage to Diandra Luker and was released from solitary confinement in the same prison earlier this year.
A source told Radar: "It's great news.
"Cam really isolated himself from everyone when he got into meth. He went to a dark place. But his family and friends are standing by him and hope he's serious about his recovery. He still has a chance to have a great life."
Meanwhile, Michael - who turns 70 this month - was reportedly living separately from his wife Catherine Zeta-Jones, with whom he has two children Dylan, 14, and Cerys, 11, at the end of last year but the couple have since reconciled.
Catherine, 44, has previously opened up about the strain Michael's throat cancer diagnosis in 2010 had on the couple, describing herself as a "mess" after the her husband was misdiagnosed, "not once, not twice, but three times".
The actress said: "When I'm married to a man who has such a conviction for life ... he fights to make the wrongs right. For the first time he was fighting for his life."

Professor Green decided against splashing out on a big present for wife Millie Mackintosh on their first anniversary today (10.09.14).
The rapper took to his Instagram account to post a picture of the couple on their wedding day one year ago and joked he was quite pleased the first anniversary is traditionally known as the "paper anniversary" because he spent so much money on last year's nuptials.
In a message attached to a picture of the pair on their big day, he wrote: "1 year ago today. Weddings are expensive so it's quite fortunate the first wedding anniversary is the paper anniversary. Nuff love @camillamackintosh (sic)"
Pro - whose real name is Stephen Manderson - later took to his Twitter account to wish his beautiful wife a happy anniversary.
He tweeted: "This time last year I was putting the finishing touches to my wedding speech. Happy anniversary @millsmackintosh x (sic)"
Millie also took to the social networking site to talk about the couple's anniversary and admitted she was getting emotional recalling her big day.
She wrote: "Feeling very emotional remembering how I felt 1 year ago on my wedding day year ago and also because it's @MillieMClothing's launch! #11am (sic)"
Pro has been very busy of late preparing for his tour later this year, and he got the perfect piece of practice by performing for fans of his other love, Nando's chicken, when he jumped on top of Nando's festival food truck - the Cock o' Van - at Bestival on Sunday (07.09.14) as Skream's special guest.
The rapper stormed the Nando's Rule The Roost Stage to the surprise of several attendees.

David Beckham insists he doesn't regret wearing a sarong and would be happy to put one on again.
The 39-year-old hunk was universally mocked after he was seen wearing the skirt-like garment on a night out with wife Victoria Beckham in 1998, but he insists he still has a penchant for the clothing.
He said: "Sarongs are great. That's one thing I never regret because I thought it looked great and I would still wear it now.
"Over the years it's not just myself, everybody looks back at old pictures of themselves and thinks, 'I can't believe I wore that, or I wish I hadn't wore that, or what was I thinking?'
"You make mistakes over the years or you wear things that were right at the time."
The retired footballer admits he often gets advice from wife Victoria about what he should wear and insists he trusts the fashion designer's opinion.
Speaking on ITV morning show 'Lorraine', he added: "She has her say ... well, she has opinions. I'm my own person so I think if something looks good then I'll wear it. But she definitely has opinions over the years about certain things I wore.
"When you're in a relationship, when you are married then you trust their judgement. And she's got a pretty good eye."
However, David - who has sons Brooklyn, 15, Romeo, 12 and Cruz, nine, as well as three-year-old daughter Harper with Victoria - admits he doesn't tend to vary his clothing choices as he knows what he likes and sticks to it.
He said: "I'm always in black jeans, black T-shirt and my Go-To boots. I have got more than one black T-shirt though and one more pair of black jeans."
While the former England captain doesn't change up his clothing choices much, he admits he is "very proud" of former Spice Girls singer Victoria's achievements in the fashion industry.
He added: "I'm very proud of what she's achieved, what she's done. To go from being a Spice Girl, the biggest girl band in history, to be respected in the fashion industry, that's something that doesn't happen overnight.
"To see the scale of what she's created is special."

Paolo Nutini wanted his stage name to be 'Frankie Vaseline'.
The half-Scottish, half-Italian singer has admitted that he often despairs when confused fans think he is using an alias on stage.
The 'These Streets' hitmaker - whose birth name is Paolo Nutini - told GQ magazine: "A lot of people say, 'Come on, what's your real name?' But if I had a stage name it would be 'Johnny Moped' or 'Frankie Vaseline'. Not Paolo Nutini."
The 27-year-old musician recently came back to the scene with his hugely successful album, 'Casutic Love' following a four-year hiatus after releasing his second album, 'Sunny Side Up' in 2009.
Regarding the break, he explained: "[It] was really for the music, in that I wasn't too sure what I was writing about. I really needed to experience things to write."
Meanwhile, Paolo recently admitted he is keen to collaborate with Pharrell Williams in the future and believes the 'Happy' singer has the "Midas touch" - meaning he can do no wrong in the industry.
He said: "He's the man with the Midas touch. I don't think it is as easy as just saying, 'Hey Pharrell, let's do this!'
"But I think he seems to be making more and more music. He seems a busy man just now but who knows maybe I'll bump into him. You never know."

Demi Lovato has started to work on a new album.
The 'Heart Attack' hitmaker is beginning to pen tracks for her next LP but she admits the record probably won't be ready for a release for a "while" because she's busy with her world tour at the moment.
Speaking to MTV News US, she said: "I am working on a new album. I think that I'll be so extremely busy with the world tour it won't come out for a while but I have started and have worked on some stuff that is really amazing and I can't wait for people to hear it."
The 22-year-old singer is determined to have a more "organic" sound on her next album but admits she probably won't decide on the genre of the record until all of the tracks have been put together.
She explained: "That's one of the most exciting parts about my entire life is creating music and listening to it over and over and over again and getting excited and thinking, 'What are people going to think when they hear this?' "
She added: "I'll say I want to make a more country album or I want to make a more rock album or I want to make an R&B album and it's like, I will never know until all the songs are on the actual album because what happens is I love all different types of music, I'm influenced by every single type of music there is.
"I'll never know until I decide which songs are on the album and it may be a compilation of different types and it may all just be pop or it may take on a life of its own."

U2 are giving away their 13th studio album for free. The Irish rockers - made up of Bono, The Edge, Adam Clayton and Larry Mullen Jr - have made their latest offering 'Songs Of Innocence' available cost-free to over a half a billion U2.com subscriber...

Emma Watson has reportedly moved in with Matthew Janney.
The 24-year-old actress, who started dating the Oxford University student late last year, was spotted loading her furniture, including rugs, cooking pots and chairs, into a moving truck outside her home in London with the rugby player, 21, over the weekend.
An eyewitness told E! News: "The couple was very affectionate as they moved items. At one point Matthew wrapped his arms around Emma and kissed her."
The couple were assisted by professional movers, but it is not know whether they were taking the former 'Harry Potter' star's items to Matthew's apartment or to an entirely new home.
The 'Noah' actress previously admitted she finds it hard to commit to living in one place.
Earlier this year, she said: "People are like, "Where are you living? What are you doing?" I don't know.
"I'm too young to decide right now if I want to live here [in London] or in New York or in LA or wherever else. And I really struggled for the answers the past three years. I should really know! I should really commit!"
Matthew was allegedly known as a womaniser before meeting Emma, but a source previously said: "Matt's a real hit with the girls but he may have finally met his match.
"She doesn't suffer fools gladly. But Matt's a lovely guy, charismatic and intelligent. They make a great couple."
The brunette beauty prefers to date regular guys and tries her best to "protect" them as she believes its "unfair" for them to be forced into the public eye.
She recently said: "I don't date people who are famous.
"I don't think it's fair that, all of a sudden, intimate details of their personal life are public as a direct result of me. I wish I could protect them."

Ashley Tisdale was "hyper-focused" on keeping her wedding a secret.
The 29-year-old actress, who married rocker Christopher French on Monday night (08.09.14), exchanged vows in a low-key ceremony at a private estate in Santa Barbara, California and the couple "couldn't have looked happier."
A source told gossip website RadarOnline.com: "It was all very top secret. Ashley has been hyper-focused on keeping it a secret. She wanted it to be her day and didn't want it to be a circus.
"All the guests went to a secret location and shuttled to the estate. Security was very tight. They took everyone's cell phones and electronics."
Another insider told E! that approximately 100 guests were present, including the blonde beauty's close friend and former 'High School Musical' co-star Vanessa Hudgens, who was one of six bridesmaids.
The insider added: "They couldn't have looked happier."
Their other co-star Zac Efron was forced to miss the event, but he shared his congratulations on Twitter on Tuesday (09.09.14), writing: "Congrats Ash and Chris (sic)"
Guests threw white flower petals at the couple after they were pronounced husband and wife.
Ashley shared a pictures from her wedding day on Instagram on Tuesday, calling it "the best day" of her life.