Happy Birthday: Agneta Åse Fältskog (born 5 April 1950) is a Swedish singer, songwriter, and a former member of the pop group ABBA. She first achieved success in Sweden with the release of her 1968 self-titled debut album. She rose to international stardom in the 1970s as a member of ABBA, which is one of the best-selling music acts in history. She is the youngest member of ABBA, and the only one born in the 1950s.

After the unofficial break-up of ABBA in December 1982, she renewed success later in the decade as a solo artist with three albums and a leading role in a movie. She became reclusive in the 1990s, avoiding outside publicity and residing on the Stockholm County island of Ekerö.

Fältskog stopped recording music for 16 years until she released a new album, My Colouring Book, in 2004. She returned in 2013 with A, her highest UK charting solo album to date. ABBA has since reformed, and Fältskog has resumed her previous role with the group.