10. Mariah Carey
Even the Mariah haters have to marvel at all this woman has accomplished. She's sold over 200 million records, and has 18 Number One singles – more than any other solo artist in history. Many counted her out after 2001's Glitter turned to dust, but she came roaring back in 2005 with The Emancipation Of Mimi and her supporting role in Precious a few years later. Sure, the last two albums didn't do so hot – but another comeback is always right around the corner for Mariah.