ABBA's Frida Lyngstad thinks pop music changed after the Swedish group became successful in the 1970s.
The 'Waterloo' hitmakers - including Bjorn Ulvaeus, Agnetha Faltskog and Benny Andersson - claim the music scene shifted when they started writing chart hits.
Frida told the Guardian newspaper's G2: "The music scene changed with us - something like ABBA didn't exist before, pop like that was not invented yet."
After their huge success early on, Bjorn feels they should have stuck to what they were good at instead of trying to go in a different musical direction with songs like their 1973 single 'Ring Ring'.
He explained: "If you look at the singles we released straight after 'Waterloo', we were trying to be more like The Sweet, a semi-glam rock group. Which was stupid because we were always a pop group."
Bjorn was annoyed when critics claimed the band created hits to order and the songs didn't have any heart.
He said: "Waterloo, Mamma Mia, Fernando, Dancing Queen, The Winner Takes It All ... are they made to a formula?
"What is that formula? It's totally the opposite. We never repeated ourselves. We worked so hard to find different styles every time."

Chimamanda Ngozi Adichie thinks more women are talking about feminism because of Beyonce.
The Nigerian novelist, whose TED talk about women being expected to aspire to marriage, was sampled on Beyonce's track 'Flawless', thinks the 'XO' hitmaker is inspiring.
She told The Times newspaper: "Because of Beyonce many young women are talking about feminism and hopefully young men because she has such a following."
Chimamanda realises what Beyonce has been singing about in her new music is a departure from her 'Single Ladies' track, in which she asked men to "put a ring on it" but doesn't think it makes her less of a feminist.
She said: "Well, I suppose there are different feminisms. I am all about bringing people to the party and having a good conversation, rather than saying you can't come in. I have had young people in Nigeria who probably would have never heard of my TED talk without Beyonce and who are now talking about feminism."
She added: "I like the idea that Beyonce's song might make girls feel that they can ask to try to do these things."

'EastEnders' star Sam Strike says Danny Dyer has given up trying to help him with girls.
The 20-year-old actor plays Johnny Carter in the BBC One soap with Danny, 36, taking on the role of his father Mick and, although his on-screen character is more interested in men, in real life he claims he has trouble with the ladies.
Quizzed on whether Danny had been giving him any tips on how to pick-up girls, Sam exclusively told BANG Showbiz: "Well they'd be redundant, you know, I'm kind of like...not very good at talking to girls anyway. So I think he knows not to bother. He has tried in the past."
The young heartthrob confessed that prior to joining the soap with 'The Football Factory' star last Christmas, he was worried that they wouldn't get along.
He explained: "I was kind of concerned that Danny is a proper lad and I'm more of a skateboarder-surfer kind of guy. So I was a bit worried about that, but no he's lovely and it didn't matter."
Sam, who is known for playing Daniel 'Dan' Morgan in the CBBC's M.I. High, praised his on-screen father and admitted he feels privileged to have joined the cast at the same time as him.
He added: "He's lovely, a really nice guy and obviously very good at what he does. I was lucky to come into it with him. He's great."

Colin Morgan has been cast in 'The Fall'.
The 28-year-old actor has landed the role of DS Tom Anderson in the award-winning BBC drama, opposite Jamie Dornan and Gillian Anderson.
Colin's alter-ego, who is an officer involved in the hunt for serial killer Paul Spector (Jamie), will work closely with Detective Superintendent Stella Gibson (Gillian).
Colin said: "I'm delighted to be joining the cast of 'The Fall' for what is going to be an exciting and gripping second series. Allan Cubitt has written exceptional material and I feel very privileged to be working with him and the very talented cast."
Colin will join the cast, which is currently filming in Belfast, Northern Ireland, for the final three episodes of the second series of the gripping psychological thriller.
Meanwhile, the hunky star is set to pull in more viewers for the show after he won a National Television Award last year for his leading role in the the primetime series 'Merlin'.
'The Fall' is currently in the running for two BAFTA awards for series one after Jamie was nominated for the Leading Actor gong, and the show got a nod for Best Mini Series.
'The Fall' will return to screens with its second series at the end of the year.

James Corden and Gary Barlow will embark on a road trip across the UK for a one-off documentary.
The 35-year-old star will get up close and personal with the Take That singer to discuss the highs and lows of his nearly 25 years in the limelight, including his pop comeback, for the BBC One show 'When Corden Met Barlow'.
The special will show the beginnings of his career in the working men's club, the success of Take That, and the darker times of his life, which have inspired his lyrics.
The documentary will see the pair travel around the country to visit key places from Gary's childhood and adult life.
Charlotte Moore, controller of BBC One, said: "BBC One brings you this special documentary starring two of Britain's biggest characters, which sees James Corden take a road trip with Gary Barlow to discover the real story of his remarkable career."
The one-off special will also feature Gary's family and friends, as well as Sir Elton John, Chris Evans and Robbie Williams, along with members of the press who have written about the 43-year-old star over the years.
'When Corden Met Barlow' is set to air later this year.

Jennifer Connelly is proud of her 'Noah' character's "extraordinary strength".
The actress claims her character Naameh is seen from a different perspective in the film - which sees Noah build an ark for his wife and the world's animals after God destroys the earth with a flood - as the bible does not reveal much about her.
Jennifer, 43, told Vogue.com: "If you read Genesis, she doesn't even have a name.
"But, in the context of the story, I do think that she has extraordinary strength. She's physically capable, she's industrious, I think that she changes the outcome of the story. I think she's enterprising, she has great reserves of strength - and that the source of that strength, really, is love.
"I think that's what really makes her powerful: that she embodies a very profound love."
Jennifer also insists Naameh's dependence on her husband Noah, who is played by Russell Crowe, should not be seen as a weakness.
She added: "I don't think that there's anything wrong with being supportive, and devoted, and having faith. I mean, it's a very particular circumstance - the creator has been communicating with Noah - so one understands her faith and following him."

Nicolas Cage was excited to work with amateur actors in 'Joe'.
The 'Ghost Rider' actor is currently starring as an ex-convict in the drama alongside a host of professional and non-professional actors including Gary Poulter, a homeless man who was discovered by the director David Gordon Green and his casting agents.
Quizzed on what it was like to work with amateur actors, Nicholas told Collider: "It's an element of surprise. I was really up for it.
"The one I'm thinking of is Gary Poulter who plays Tye Sheridan's father in the movie. He was discovered doing Vincent Price's 'Welcome to My Nightmare' monologue from the Alice Cooper album about the black widow spider and David saw that and said I want to give you a part and he auditioned him and auditioned him and finally gave him the part.
"I thought it was exciting. This was an opportunity for me to try something new, working with non-actors. He never dropped the ball, he was always on point."
The 50-year-old star plays a former convict who becomes an unlikely role model for Tye's character Gary, as he is faced with the opportunity to either redeem himself or run, and he took the preparation for his role very seriously.
He explained: "I flew out a month early which is kind of unheard of in Hollywood. I wanted to bond with David, I wanted to understand his process and get in step with how he likes to make a movie.
"I got to meet with Tye to make sure that we had chemistry, so it was an enormously valuable experience to go to Austin a month early."

Vanessa Paradis feels nostalgic about the past.
The singer-turned-actress, who split from Johnny Depp in 2012 after a 14-year relationship, has briefly opened up about her romance with the 'Pirates of the Caribbean' actor, revealing she still has fond memories of their time together.
Probed by France's Marie Claire magazine about whether she regrets the past, she coyly replied: "These things are too personal. I don't want to spill my soul to a magazine, and moreover, I'm very lucky.
"I don't know if I'm really melancholic because I like to live in the present and make the most of the positive things that exist. Of course, I'm sometimes nostalgic about the past, but it's a good nostalgia."
Vanessa quickly shut down the line of questioning about the father of her two children, Lily-Rose, 15, and Jack, 12, who has just confirmed his engagement to his 'Rum Diary' co-star Amber Heard.
However, she added: "Love is such an intense feeling. Naturally, in love there are good and bad sides. "
The 'Joe Le Taxi' singer confessed motherhood has been the biggest transformation of her life to date and thinks nothing can top the feeling.
She said: "My biggest change has been becoming a mother. There isn't anything stronger or more intense than that transformation, in your mind, your body and your life."
Vanessa also avoided queries about whether her new short hairdo was due to a desire to break from the past.
She insisted: "It's for a sketch by John [Turturro] for 'Rio, I Love You'. He asked me to cut them. My hair was all over the place, so it didn't take long for me to accept."

Minnie Driver has quit Twitter.
The 'About a Boy' actress - who has five-year-old son Henry from a previous relationship - is taking a break from the social networking website after getting upset at jibes about her appearance following the publication of pictures of her strolling on a Miami beach in a bikini with her little boy.
She tweeted: "God some people are horrible: you try being photographed when you don't know it's happening, when you're on holiday with your kids.
"I'm out of this Twittersphere for a while. It's too mean sometimes, about your body , about your soul. Not worth it. (sic)"
Minnie headed off on holiday earlier this week and was determined to have a good time with her loved ones.
She tweeted on Tuesday (08.04.14): "Finally on holiday with my family. I'm going to make 4 days feel like a month."
The slender 44-year-old actress has previously spoken of how she finds it "quite easy" to lose weight after gaining pounds for a role.
She has said: "You have to eat less and move around more."

Anastacia loves her "bionic boobies".
The 'I'm Outta Love' hitmaker underwent a double mastectomy last year after discovering she had breast cancer for a second time and she insists she "couldn't care less" about losing her natural breasts.
She said: "I call them my bionic boobies. They're fabulous. I was a triple D, now I'm a C-cup, so I'm perfectly happy.
"I can finally wear little spaghetti straps. Personally, I couldn't care less about losing my natural boobs. I wanted to be done with breast cancer."
The 45-year-old singer was insistent about having the operation, even though doctors said she didn't need to, as she didn't want to find herself battling the disease again in the future.
She told the Daily Mail newspaper: "This last time, it was such a small piece of cancer I could have had a biopsy and some treatment and called it a day, but I've been there. And that didn't change anything. It just came back.
"I thought, 'I don't want to go through this again. If I do, is there going to be a third time or a fourth? Will that be the killer?' I said to the doctor, 'I know this seems drastic to you because you'd like to keep my natural boobs, but I want to live. I don't want to play Russian roulette with my breasts and my life.' "
Anastacia insists she was "prepared" for the procedure as she had done her research several years before when she had another cancer scare.
She explained: "I was surprisingly prepared for it. Because about two years after the first diagnosis, I had an abnormal reading, so had to have a biopsy. I freaked out and researched a double mastectomy.
"The biopsy was benign and the recovery time from the operation was about a year, so I opted not to elect to do something, but it planted the seed, 'If it comes back, this is what I will do'.
"I had many years to sit with that."

Michael Jackson's ex-wife wants guardianship of their children.
Debbie Rowe - who was married to the late 'Thriller' star for just under three years until October 1999 and had children Prince, 17, and Paris, 15, with him - is also said to wants to take responsibility for Michael's son Blanket, 12, who was reportedly born via surrogate.
According to TMZ, Debbie thinks their grandmother Katherine Jackson, who is the children's legal guardian, is too old to care for them properly.
A source said: "Debbie is deeply concerned about the environment in the Jackson home. She likes Katherine Jackson but believes she has gotten way too old to serve as guardian."
She reportedly told a friend: "Katherine's not connected with the kids or involved in their lives."
Debbie, 55, is also said to be concerned Michael's brothers are spending too much time at their Calabasas house in California and have been a "terrible influence" on the children.
She is also rumoured to be "upset" with Michael's brother Jermaine, who will appear on 'Celebrity Wife Swap' in coming weeks, because she thinks it's "extremely inappropriate".
Debbie is set to file legal documents asking the judge to appoint her guardian so she can move the children to her ranch in Palmdale, California, where she has a business raising and breeding horses.
She originally lost contact with her children after divorcing Michael in 1999, but has been getting closer to them over the last year with the blessing of the Jackson family.

Kyle Minogue has quit 'The Voice UK' after one series.
The pint-sized pop star - who replaced Jessie J as a coach on the singing competition for its third series - has decided to bow out from her role after just one year due to a schedule clash with her upcoming 'Kiss Me Once' tour.
She wrote on her Facebook page: "Hi Lovers, thanks to all of you for your incredible support throughout this past season of 'The Voice UK'.
"I'm sad to say that, due to the timing of my European tour, I won't be back for Season 4. I absolutely loved my time on the show, and I'll miss all of the incredible people who were a part of my experience.
"I hope to see you all on my 'Kiss Me Once' tour, and wish continued success to everyone at 'The Voice'!"
The 45-year-old singer joined the panel with fellow newcomer Ricky Wilson, sitting alongside veteran coaches will.i.am and Sir Tom Jones.
Although she's quit the British version, Kylie is expected to be a coach on the Australian version of 'The Voice' with will.i.am this year.
'The Voice' producer Moira Ross said: "Kylie has brought her own very special magic to 'The Voice UK' and we have loved having her on the show. We wish her well for her tour and hope to welcome her back in the future."