Abba Foursome(01 of28)
Open Image Modal7th April 1974: Swedish pop stars (from right), Benny Andersson, Anni-Frid Lyngstad, Agnetha Faltskog and Bjorn Ulvaeus of the Swedish pop group ABBA. (Photo by Steve Wood/Express/Getty Images) (credit:Getty Images)
Photo of ABBA(02 of28)
Open Image ModalUNITED KINGDOM - APRIL 07: Photo of ABBA; L-R: Benny Andersson, Anni-Frid Lyngstad, Agnetha Faltskog, Bjorn Ulvaeus - posed, group shot, in field - after winning Eurovision Song Contest (Photo by Gems/Redferns) (credit:Getty Images)
Photo of ABBA and EUROVISION SONG CONTEST(03 of28)
Open Image ModalUNITED KINGDOM - APRIL 07: Photo of ABBA and EUROVISION SONG CONTEST; L-R (back): Agnetha Faltskog, Anni-Frid Lyngstad, (front): Bjorn Ulvaeus, Benny Andersson - posed, group shot, on beach, after winning the Eurovision Song Contest (Photo by John Rodgers/Redferns) (credit:Getty Images)
Abba(04 of28)
Open Image ModalCOPENHAGEN, DENMARK: (L-R) Björn Ulvaeus (Bjorn Ulvaeus), Agnetha Fältskog (Agnetha Faltskog), Anni-Frid Lyngstad, Benny Andersson of pop group Abba pose for a group shot in Copenhagen, Denmark in 1974. (Photo by Jorgen Angel/Redferns) (credit:Getty Images)
Abba(05 of28)
Open Image ModalCOPENHAGEN, DENMARK: L-R: Björn Ulvaeus (Bjorn Ulvaeus), Agnetha Fältskog (Agnetha Faltskog), Anni-Frid Lyngstad and Benny Andersson of the pop group Abba pose with a bunch of flowers in 1974 in Copenhagen, Denmark. (Photo by Jorgen Angel/Redferns) (credit:Getty Images)
Abba(06 of28)
Open Image ModalCOPENHAGEN, DENMARK: (L-R) Björn Ulvaeus (Bjorn Ulvaeus), Agnetha Fältskog (Agnetha Faltskog), Anni-Frid Lyngstad, Benny Andersson of pop group Abba pose for a group shot in Copenhagen, Denmark in 1974. (Photo by Jorgen Angel/Redferns) (credit:Getty Images)
Abba(07 of28)
Open Image ModalAbba group shot, London, 1974, (L-R) Bjorn Ulvaeus, Anni-Frid Lyngstad, Agnetha Faltskog, Benny Andersson. (Photo by Michael Putland/Getty Images) (credit:Getty Images)
Abba(08 of28)
Open Image ModalCOPENHAGEN, DENMARK: Björn Ulvaeus (Bjorn Ulvaeus), Agnetha Fältskog (Agnetha Faltskog), Anni-Frid Lyngstad and Benny Andersson of the pop group Abba holding a silver disc for sales of their second album 'Waterloo' in 1974 in Copenhagen, Denmark. (Photo by Jorgen Angel/Redferns) (credit:Getty Images)
Abba(09 of28)
Open Image ModalCOPENHAGEN, DENMARK: An actor playing Napoleon (centre) poses with the pop group Abba, (L-R) Anni-Frid Lyngstad, Benny Andersson, Björn Ulvaeus (Bjorn Ulvaeus), Agnetha Fältskog (Agnetha Faltskog), to promote their single Waterloo in Copenhagen, Denmark in 1974. (Photo by Jorgen Angel/Redferns) (credit:Getty Images)
Swedish pop group Abba, performs during(10 of28)
Open Image ModalSwedish pop group Abba, performs during the the Eurovision Song Contest 1974 on February 09, 1974 in Brighton with their song Waterloo. Abba won the Eurovision Song Contest in England with 'Waterloo', this was the beginning of the greatest career in Swedish pop music history. The 'Waterloo' LP was released in England and America after many TV appearances. MANDATORY CREDIT AFP PHOTO/SCANPIX SWEDEN-OLLE LINDEBORG (Photo credit should read Olle Lindeborg/AFP/Getty Images) (credit:Getty Images)
25th Annual Rock And Roll Hall Of Fame Induction Ceremony - Show(11 of28)
Open Image ModalNEW YORK - MARCH 15: (L-R) Anni-Frid Princessan Reuss and Benny Andersson of ABBA speak onstage as Barry Gibb and Robin Gibb look on at the 25th Annual Rock And Roll Hall of Fame Induction Ceremony at the Waldorf=Astoria on March 15, 2010 in New York City. (Photo by Michael Loccisano/Getty Images) (credit:Getty Images)
Bonnie Tyler Unveils ABBA Wax Figures(12 of28)
Open Image ModalBERLIN, GERMANY - APRIL 20: Wax figures of the members of the Swedish pop group ABBA, (L-R) Anni-Frid Lyngstad, Benny Andersson, Agnetha Faltskog, and Bjoern Ulvaeus, wearing copies of the outfits made for the group's 1975 hit 'SOS,' stand at Madame Tussauds wax museum on April 20, 2013 in Berlin, Germany. The sculptures will be temporarily in Berlin before traveling to other cities, cost 187,666 Euros (USD 244,900), and took four months to create. (Photo by Adam Berry/Getty Images) (credit:Getty Images)
SWEDEN-MUSIC-ABBA-MUSEUM(13 of28)
Open Image ModalTO GO WITH A STORY BY Camille BAS-WOHLERT Visitors pass by the name of Swedish disco band ABBA displayed on May 7, 2013 in Stockholm in an installation exhibited at world's first permanent ABBA museum. Swedish group ABBA dominated the 1970s disco scene with their catchy melodies and kitsch dance routines. AFP PHOTO / JONATHAN NACKSTRAND RESTRICTED TO EDITORIAL USE (Photo credit should read JONATHAN NACKSTRAND/AFP/Getty Images) (credit:Getty Images)
Photo of ABBA(14 of28)
Open Image ModalUNITED KINGDOM - MAY 01: TOP OF THE POPS Photo of ABBA, L-R: Benny Andersson, Anni-Frid Lyngstad, Bjorn Ulvaeus, Agnetha Faltskog performing 'Waterloo' on Top Of The Pops TV Show (Photo by David Redfern/Redferns) (credit:Getty Images)
ABBA Thumbs Up(15 of28)
Open Image ModalSwedish pop group ABBA give the thumbs up after winning the Eurovision Song Contest with their song 'Waterloo', Brighton, 7th April 1974. Left to right: Bjorn Ulvaeus, Agnetha Faltskog, Anni-Frid Lyngstad and Benny Andersson. (Photo by Steve Wood/Daily Express/Hulton Archive/Getty Images) (credit:Getty Images)
ABBA Pose For A Portrait(16 of28)
Open Image ModalCOPENHAGEN, DENMARK - APRIL 01: (L-R) Benny Andersson, Anni-Frid Lyngstad, Agnetha Faltskog and Bjorn Ulvaeus of Swedish pop group ABBA pose for a group portrait in a garden in Copenhagen, Denmark in April 1974. (Photo by Jan Persson/Redferns) (credit:Getty Images)
More Abba(17 of28)
Open Image Modal7th April 1974: Swedish pop stars (from right), Anni-Frid Lyngstad, Benny Andersson, Bjorn Ulvaeus and Agnetha Faltskog of the Swedish pop group ABBA. (Photo by Steve Wood/Express/Getty Images) (credit:Getty Images)
Photo of ABBA(18 of28)
Open Image ModalUNITED KINGDOM - JANUARY 01: Photo of ABBA; L-R: Benny Andersson, Agnetha Faltskog, Anni-Frid Lyngstad, Bjorn Ulvaeus - posed, group shot (Photo by Gems/Redferns) (credit:Getty Images)
Abba(19 of28)
Open Image ModalCOPENHAGEN, DENMARK: Pop group Abba pose for a group shot, (L-R) Benny Andersson, Anni-Frid Lyngstad, Agnetha Fältskog (Agnetha Faltskog) (front) and Björn Ulvaeus (Bjorn Ulvaeus), in May 1975 in Copenhagen, Denmark. (Photo by Jorgen Angel/Redferns) (credit:Getty Images)
Abba(20 of28)
Open Image ModalCOPENHAGEN, DENMARK: Pop group Abba hold discs for sales of their third album 'Abba', (L-R) Björn Ulvaeus (Bjorn Ulvaeus), Agnetha Fältskog (Agnetha Faltskog), Anni-Frid Lyngstad and Benny Andersson in May 1975 in Copenhagen, Denmark. (Photo by Jorgen Angel/Redferns) (credit:Getty Images)
Abba(21 of28)
Open Image ModalCOPENHAGEN, DENMARK: Pop group Abba pose for a group shot, (L-R) Benny Andersson, Anni-Frid Lyngstad, Agnetha Fältskog (Agnetha Faltskog) (front) and Björn Ulvaeus (Bjorn Ulvaeus), in May 1975 in Copenhagen, Denmark. (Photo by Jorgen Angel/Redferns) (credit:Getty Images)
Abba File Photos(22 of28)
Open Image ModalAbba 1977 (Photo by Chris Walter/WireImage) (credit:Getty Images)
ABBA(23 of28)
Open Image ModalSwedish pop group ABBa, circa 1975. (Photo by Maureen Donaldson/Getty Images) (credit:Getty Images)
Abba(24 of28)
Open Image ModalCOPENHAGEN, DENMARK: Pop group Abba pose for a group shot, (L-R) Benny Andersson, Anni-Frid Lyngstad, Agnetha Fältskog (Agnetha Faltskog) (front) and Björn Ulvaeus (Bjorn Ulvaeus), in May 1975 in Copenhagen, Denmark. (Photo by Jorgen Angel/Redferns) (credit:Getty Images)
Photo of ABBA(25 of28)
Open Image ModalGERMANY - SEPTEMBER 22: Photo of ABBA; Bjorn Ulvaeus, Anni-Frid Lyngstad, Agnetha Faltskog - performing 'SOS' on 'Musikladen' TV show, wearing cat dresses (Photo by Petra Niemeier - K & K/Redferns) (credit:Getty Images)
Abba In New York(26 of28)
Open Image ModalNEW YORK - 15th NOVEMBER: Swedish group Abba posed backstage on Saturday Night Live TV show in New York on 15th November 1975. Left to right: Anni-Frid Lyngstad, ?, Agnetha Faltskog, Bjorn Ulvaeus and Benny Andersson. (Photo by Fin Costello/Redferns) (credit:Getty Images)
Photo of Anni-Frid LYNGSTAD and Agnetha FALTSKOG and ABBA(27 of28)
Open Image ModalGERMANY - SEPTEMBER 01: Photo of Anni-Frid LYNGSTAD and Agnetha FALTSKOG and ABBA; Agnetha Faltskog & Anni-Frid Lyngstad - posed (Photo by Petra Niemeier - K & K/Redferns) (credit:Getty Images)
Abba(28 of28)
Open Image Modalcirca 1975: Swedish pop group ABBA (L-R: Benny Andersson, Frida Lyngstad, Agnetha Faltskog, Bjorn Ulvaeus), wearing similar white Asian-influenced costumes, perform for the television program Midnight Special with a neon 'ABBA' sign in the background. (Photo by Hulton Archive/Getty Images) (credit:Getty Images)