Alicia Keys - For most people, pregnancy means nine months of kicking up your cankles and cracking open pints of ice cream. But not if you're a celebrity. Superstar moms-to-be keep up their busy schedules well into the third trimester. Jaws dropped when a six-month pregnant Keys jumped on a piano during her tribute to Prince during the 2010 BET Awards. For the second time around, the singer is still keeping it moving. With a new children's book titled The Journals of Mama Mae & Lee Lee set to release soon, Keys is heavily promoting and isn't worried that she's eight months along.(Photo: Shirlaine Forrest/Getty Images for MTV)