It's hard to believe that the ubiquitous Lady Gaga -- No. 7 on this year's Forbes 100 Most Powerful Women -- is just 24-year-old Stefani Germanotta, who a few years ago, was singing in dive joints on New York's Lower East Side.

It has been a year of success and excess for Gaga, with hit singles, a hugely popular tour and a succession of bizarre costumes that culminated in the infamous meat dress she wore at the MTV Video Music Awards. Join us as we review Lady Gaga's 10 most outlandish looks of 2010.