A couple of weeks ago, an ESSENCE.com staffer showed up to work rocking a gloriously puffy, kinda-straight, kinda-curly shoulder-length do, and we all exclaimed "Sister Sledge!" Since then, we've been obsessed with the late '70s/early '80s girl group--and not just for their post-afro, pre-Jheri curls roller set coifs, either. Their music was everything! Born in Philadelphia, sisters Kim, Debbie, Joni and Kathy Sledge were literally born to sing (their grandmother Viola Williams, was a famous opera singer). After forming a group in 1972, the teenagers toured the local circuit until striking big in 1979 with their Nile Rogers-produced disco anthems, "We Are Family," and "He's the Greatest Dancer." The gorgeous sisters kept releasing albums throughout the Eighties, but outside of 1985 hit, "Frankie," they never enjoyed the huge success of their disco hits. No matter--Sister Sledge was a totally iconic, endlessly fab group, and they had hair to die for. Here, we salute the fierce Sledge sisters with a gallery of products inspired by their hot hairstyles.