Christina Aguilera plans to marry Matthew Rutler at Christmas.
The 'Voice' USA mentor, who is expecting her first child with her fiancé, is reportedly scouting for tropical venues for their nuptials, as she wants to tie the knot a few months after their daughter is born.
A source said: "They love Hawaii, where they got engaged, but Christina is worries about privacy, so they might rent a private island."
The singer, who also has son, Max, six, from her first marriage to Jordan Bratman, wants a "laid back" wedding.
The insider added to Life & Style magazine: "It will be a nondenominational ceremony. Last time Christina got married, it was officiated by a rabbi. This time, it will be a lot more laid back."
Matt proposed to Christina in February, and it was previously revealed he spent a year designing the perfect engagement ring.
A source said: "Matt has been working on the ring for over a year and been working on the proposal for several months.
"Matt spent a year's time mastering all the specific details with the designer to signify their love and their journey together - it's all reflected in the ring."
Matt - who has been dating Christina since they met on the set of her 2010 movie 'Burlesque', on which he was a production assistant - took inspiration from two of the 'Beautiful' hitmaker's favourite pieces of jewellery and thought carefully about the meaning behind the nine gemstones which accompany the diamond.
The source continued: "Matt knew what her two favourite rings were and married them together into one, incorporating all the details that she specifically loved. Every jewel and diamond placing has a reason and meaning for being placed there."

Kanye West says there is "much more to come" from Kim Kardashian's video game.
The rapper's wife is the star of new mobile app 'Kim Kardashian: Hollywood', and he has promised fans it is an ongoing project as they keep listening to feedback and suggestions.
He told E! News: "I love that fans are constantly telling me on social media their favorite parts of the game and even offering suggestions.
"We're working really hard to integrate fan feedback and we've already added one of my favorite vacation spots to the game!
"There's so much more to come, including plenty of cute new looks and exotic locations."
The game allows the player to choose a celebrity character and navigate them around Hollywood as they attempt to gain fame, attend glamorous events, join in photo shoots and fall in love.
However, along the way, your character meets animated Kim as she assists you on shopping trips, nights out and styles you for shoots.
The 'Keeping Up with the Kardashians' star described being in a video game as an "amazing experience".
She added: "This project has been an amazing experience. I'm so excited that people are enjoying the game!"

Cara Delevingne has told modelling agency bosses she won't stop getting tattoos.
The 21-year-old star - who recently showed off her latest design, which is white text reading 'breathe deep' - has reportedly had a showdown with bosses after they claimed her ink meant she was risking her spot on the catwalk.
An insider told the Daily Mirror newspaper: "Cara is without doubt the world's most tattooed high profile model.
"It is not ideal for catwalk shows, especially when she's modelling delicate summerwear, and particularly feminine collections.
"But her family are totally supportive, and couldn't care less, so that's all she's really bothered about. She told bosses that anything can be airbrushed these days and it wouldn't affect her professional appeal."
It is said Cara is very independent and refuses to "take orders from anyone".
The source added: "Cara is her own person, and won't take orders from anyone.
"She also joked about Kate Moss being airbrushed, with no one complaining about that. The tattoos are here to stay."
Meanwhile, she is apparently keen to put a continued focus on her acting career and is even having to reject roles after being made so many offers.
The insider said: "Film offers are flooding in but a lot of them are ridiculous - things she would never consider in a million years.
"She's waiting for the perfect roles and, in the mean time, is focusing on getting healthy and in tip-top condition."

Robin Williams will "win" his battle with alcoholism, says Joel McHale.
The iconic comedian checked into rehab recently to help him maintain his long-term sobriety, and his 'Merry Friggin' Christmas' co-star has backed him to continue on the right path.
He told the New York Daily News newspaper's Confidenti@l column: "He wore his struggles and sobriety and was very up front and candid about what he has gone through.
"I know he is a man who likes to win and be healthy. So him going back to rehab, I pray it all works out."
The 'Community' star also described working with Robin as an education, and insisted he "would kill for the man" because he is "such an open soul".
He added: "I have never met anybody with a bigger brain than him ... When you talk to Robin you think, 'I have learned more in the last 20 minutes than I ever learned.'
"He is such an open soul and one of the most sensitive and great guys, and I would kill for the man. And I have already offered to kill people for him."
Robin's representative recently confirmed: "After working back-to-back projects, Robin is simply taking the opportunity to fine-tune and focus on his continued commitment, of which he remains extremely proud."

Jenny McCarthy has revealed her own live radio show will debut this week.
The blonde beauty - who was recently fired from 'The View' - has announced details for her next project, and 'Dirty, Sexy, Funny with Jenny McCarthy' will hit the air on Wednesday (16.07.14).
She made the announcement on 'The Howard Stern Show' today (14.07.14), and revealed they will be sharing a home on SiriusXM.
Chelsea Handler, Perez Hilton and her fiancé Donnie Wahlberg are already set to be guests, and in a statement Jenny insisted she wouldn't be holding back.
She said: "It's no secret that I love to talk. I'm excited to do it on SiriusXM without having to interrupt anyone or keep things clean.
"You can bet your sweet ass this show will live up to its title."
It seems like it will be very different to her appearances as a panelist on 'The View', particularly following reports she was axed for being "too safe".
A source recently claimed: "It's not a shock that Jenny was let go.
"[She] restrained herself and didn't say what she really thought ... She played it too safe."

Cheryl Cole has dropped her surname from her Twitter handle a week after her wedding.
The 'Crazy Stupid Love' hitmaker married her French boyfriend Jean-Bernard Fernandez-Versini in a secret ceremony last week, and she has fueled speculation she could be taking his name.
The star's name on the micro-blogging website - and her Instagram account - has changed from @CherylCole to @CherylOfficial just seven days after the big day.
Born Cheryl Tweedy, she took her ex-husband Ashley Cole's surname when they got married in 2006, but she didn't change it back after their divorce four years later.
However, after her second wedding it seems she could be ready to finally drop her former flame's moniker.
Revealing the news of her and Jean-Bernard's wedding, she posting to Instagram to "stop the speculation".
She wrote: "I usually do not discuss my personal life but to stop the speculation I want to share my happy news... Jean-Bernard and I married on 7/7/14.. We are very happy and excited to move forward with our lives together.. (sic)."

Olivia Palermo says "communication" is the key to a successful relationship.
The 28-year-old beauty - who married German model Johannes Huebl last month - has opened up about her secret to a healthy romance, and insisted "trust" and honesty are both huge factors.
She told Cosmopolitan Latina magazine: "I think it's about trust and communication.
"Open communication and supporting one another, honest love and respect really."
She also revealed her motto, which comes from Rosalind's Russell's role of Mame Dennis in the 1955 comedy 'Auntie Mame'.
She explained: "It's a quote from Auntie Mame from Rosalind Russell, 'live, live, live!'
"You should not be too uptight and not take things too seriously, but also enjoy a little bit."
Speaking recently, Olivia explained why she and Johannes had kept their wedding - which took place in Bedford, New York - a secret, noting they wanted their big day to be "very private and special".
She previously said: "We really wanted to keep this beautiful day very private and special to us and enjoyed the whole day with our family and two friends.
"Bedford is such an amazing and romantic countryside."

Cher Lloyd has congratulated Cheryl Cole on her new marriage.
The 'Want U Back' singer has offered her kind words to her former 'X Factor' UK mentor, who married Jean-Bernard Fernandez-Versini at a private ceremony last Monday (07/07/14).
Taking to Twitter, she wrote: "@CherylCole Congratulations!!! Wishing you both all the best!!! [sic]"
Cher has led the messages from other stars congratulating the newlyweds, but Cheryl's former Girls Aloud bandmates - Nicola Roberts, Sarah Harding, Kimberley Walsh and Nadine Coyle - have yet to publicly wish her well.
Cheryl took to Twitter this afternoon to thank her friends and fans for their good wishes.
She tweeted: "Thank you for all your kind messages and well wishes [sic]"
Meanwhile Cher recently admitted she wanted to build bridges with the 'Crazy Stupid Love' hitmaker, whom she fell out with after apparently hinting her mentor didn't actually sing when she performed live.
She has now said: "I've said some stupid things, been an idiot and Cheryl is one person I want to see and speak to.
"She is one woman I would go to for advice. She sent me a lovely tweet when I got married and I'd love to see her soon."

Kaley Cuoco threw a surprise birthday party for Ryan Sweeting.
The 'Big Bang Theory' actress wanted to make her husband's big day even more special because their whirlwind romance started just after the milestone last year.
Yesterday (13.07.14) the blonde star shared a video on Instagram which showed Ryan in front of a black curtain, which dropped to reveal his friends screaming and wishing him well the day before his 27th birthday.
Alongside the clip, Kaley wrote: "I think we surprised him 🙂 happy birthday baby doll."
The evening ended with a midnight pool party, and the couple seemed to have a great time.
The actress later added: "Happy birthday to my incredible husband ... I can't wait to spend every single birthday with you ... Unbelievable night with unbelievable friends! Best surprise ever."
Kaley had previously hinted at planning something special for Ryan because their whirlwind romance - they got engaged in September 2013 and married three months later - meant she didn't get to celebrate with him last summer.
She wrote last week: "I met my husband right after his birthday last year.
"I finally get to celebrate w him. Oh this is gonna be good....."

Karrueche Tran says Chris Brown's previous relationship with Rihanna has made things difficult.
The rapper's on/off girlfriend has opened up about her romance with the star - who was released from jail on June 2 after serving 108 days for violating his probation, which stemmed from his assault on the 'Stay' hitmaker in 2009 - and admitted his ex-lover's fans made things difficult.
Speaking on 'Just Keke', she said: "In this case my boyfriend is a celebrity whose ex-girlfriend is an even bigger [celebrity]...so, I'm not only am I fighting a battle with her, I'm fighting a battle with her 14 million fans or however else.
"So, imagine how that feels for me when I gotta get on Twitter and I see a whole bunch of stuff...they make up all kinds of crazy stuff and it's like they know nothing about me.
"But, you know, because they know nothing about me, because I stay so mute sometimes, that leaves open space for them to say whatever they want."
Karrueche insisted she is trying to stay positive and level-headed in the middle of the love triangle, but admitted it has been difficult.
Asked what the hardest part has been, she responded: "Um, jeez. I guess I would say the heartbreak because it was a real situation."

Katherine Heigl says she is a "neurotic actor".
The '27 Dresses' star - who recently rejected claims she can be "difficult" to work with - has admitted she can get "frustrated" but that she has matured with age.
Asked about getting older, the 35-year-old actress told E! News: "I feel more of a sense of peace. I definitely get...I'm a neurotic actor, I'm not gonna lie.
"I'm absolutely a neurotic actor and we all kind of are, but I'm less atwitter and I'm less defensive and I'm less afraid of what everybody thinks of me.
"I get my feelings hurt, and I certainly get frustrated because I want to prove I'm something, or prove to people that I'm more than they think, but I don't get quite as aflutter about it as I did in my youth."
Katherine - who is married to singer Josh Kelly - admitted she has her priorities set now, and knows "whose opinion really matters".
She added: "I have a deeper understanding of what really matters, and who really matters. Whose opinion really matters.
"And I'll just look at my husband sometimes and I'll go, 'You know what, I'm doing alright.
"Because if I were this big of an a**hole, he would not still be here.' He is way too cool to put up with that!"

A girl rendered mute after illness claims Harry Styles brought her voice back.
Laura Yeates, 15, hadn't spoken for six months after been struck down with laryngitis and pharyngitis but was able to scream when her idol blew her a kiss at a recent One Direction concert at London's Wembley Stadium.
She said: "On the day of the concert I was slightly upset because I would not be able to enjoy the atmosphere as much as the rest of the crowd.
"But we got so close to the stage and as Harry came over, he chucked water over us. I tried to scream, just to make him notice me, and when he blew a kiss in my direction, a scream came out.
"I said to my mum, 'Mum listen' and as I tried to carry on screaming, my voice was coming back more and more."
Her mother Carly Yeates added to Metro newspaper: "I was gobsmacked, I cried. Then she called her father and he cried."
Laura was particularly stunned as four trips to hospital and speech therapy sessions had failed to help her.
She added: "No psychiatrist, no speech and language, no doctor or nurse could bring my voice back, but One Direction could."