Born Stefani Joanne Angelina Germanotta, the dance-pop supernova known as Lady Gaga kicked off her career as a songwriter for Top 40 sensations such as Britney Spears, Fergie, and The Pussycat Dolls before storming the stage on her own. Gaga, as even her grandmother calls her, then rose meteorically up from the New York City club scene to the #1 position on the charts with her 2008 album The Fame and its smash singles “Just Dance” and “Poker Face.” Her futuristic costumes and avant garde stage show immediately captured the public’s imagination (and, some claim, Christina Aguilera’s too-quick-to-borrow stylists), while Gaga’s athletically alluring body and bouncy, all-natural ba-bas grabbed fans below the belt. It’s impossible not to go ga-ga over this sexy, sexy lady.