"R&B quartet Sister Sledge breezed through the 1970s with dance-pop classics like ""We Are Family,"" and in a band full of sisters it's no wonder why the song's lyrics exclaim, ""We are family/I got all my sisters with me."" The Philadelphia-based sister act lit up the R&B charts from the ‘70s through the ‘90s with dozens of hit songs and albums, relying on the disco era to carry their hits onto the mainstream music scene. While they were whole-heartedly a disco/R&B band from the ‘70s, Sister Sledge is still evident on the music scene, continuing to pump out hits well into the later stages of their career.Comprised of siblings Debbie, Kim, Joni and Kathy Sledge, Sister Sledge formed when the girls' ages spanned from 12 to 16, inking a deal with Philadelphia's Money Back label while immediately working on a breakout single. ""Time Will Tell,"" Sister Sledge's debut single, was released in 1972, thereafter signing a deal with Atco and recording the single ""Weatherman."" Busy honing their signature disco/R&B sound, Sister Sledge hit the big time in 1974 when their hit single ""Love, Don't You Go Through No Changes on Me"" finally achieved success on the Billboard charts. Albums Circle of Love and Together propelled Sister Sledge through the mid-‘70s, and finally in 1979 the girl group reached the summit of their musical journey with the album We Are Family, a release whose title track along with the song ""He's the Greatest Dancer"" made the four-piece sister act into national celebrities. ""We Are Family"" was an instant feel-good sing-along song, and it was even picked up by the World Series-winning Pittsburgh Pirates as a theme song.The success of ""We Are Family"" was monumental, but Sister Sledge continued pushing onward with a magical musical career, releasing a handful of albums and songs including 1985's hit song ""Frankie"" that led the Sledge sisters by the hand into the ‘90s. Kathy Sledge has since gone solo, but Sister Sledge has kept the girls' legacy alive with a series of live albums, released through the late ‘90s and early ‘00s."