ABBA - A swedish pop group of four members, popular during the '70s and early '80s. The name is derived from their initials; Anni-frid (Frida) Lyngstad, Benny Andersson, Bjorn Ulvaeus, and Agnetha Faltskog.
Both Frida and Agnetha have successful solo-careers, while Benny & Bjorn have two musicals based on their work, Mamma Mia and Chess. The 1994 movie Muriel's Wedding has also helped introduce younger generations to ABBA's music.
ABBA had such hits as: The Day Before You Came, SOS, The Winner Takes it All, Knowing Me Knowing You, as well as many less popular but just as enjoyable ones, among which are: Cassandra, Elaine, That's Me and Crazy World.