The genre's reigning princess Kylie Minogue made a special appearance alongside Abba's Benny Andersson at a tribute to the Swedish super-group at London's Hyde Park at the weekend.
Kylie's contribution towards the end of the three-hour concert, also attended by fellow member Bjorn Ulvaeus, was particularly important for her British fans since it was her only UK performance of 2009.
She took to the stage to sing the band's 1980 hit Super Trouper and later returned for a rendition of When All Is Said And Done with Benny.
The concert also featured turns from guest performers including Lulu, Elaine Paige, Wet Wet Wet's Marti Pellow and Kylie's old flame and Neighbours co-star Jason Donovan, who sung I Have A Dream.
Radio presenter Chris Evans – like many of the audience – really went to town for the evening, hosting the event dressed in a particularly eye-catching silver lame bodysuit.
Speaking ahead of concert, which also featured appearances by Chaka Khan, Jamie Cullum and the cast of Mamma Mia!, Kylie described the chance to share the stage and perform Abba tracks with members of the group as "a dream come true".
"Their music has played such a great part of my life from a very early age and I'm thrilled I'll be able to share that with them personally," she added.
The evening obviously held special meaning for band member Bjorn who told the 36,000-strong audience: "I'm not a nostalgic person but tonight took me back."
"Life can be pretty wonderful," he said. "Thank you for giving us this unforgettable experience."