Janet (Miss Jackson, if you're nasty) is still at it. She spent most of 2011 on a massive tour titled Number Ones: Up Close and Personal, which featured her 35 No. 1 hits. The 48-year-old also topped the New York Times' bestsellers list in 2011 with the self-help book "True You: A Journey to Finding and Loving Yourself." Last year, Jackson married Qatari billionaire Wissam Al Mana and signed a production deal with Lions Gate Entertainment. She is currently working on her 11th studio album. —XFINITY Entertainment Staff (Photo: Vittorio Zunino Celotto/Getty)
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