Nina Sky knows what to do to get people moving: their first single, the hip-shaker Move Ya Body, reached number 4 on the Billboard Hot 100 and became a club anthem. The girls use a slightly different formula this time around on Curtain Call, the first single from their long-delayed sophomore album, The Musical. Producers Big Bert and EST serve up a beat for the twin phenoms with a sultry rhythm, rolling synths, and Timbaland-like ad-libs, over which the sisters detail what they need in a man. Guest rapper Rick Ross unleashes a few complimentary verses about his dream lady to echo the girls’ desires. Will a Curtain Call herald a new, successful era for Nina Sky? Though the set doesn’t yet have a release date, you can find out when it hits stores.