Ke$ha

Ke$ha

Ke$ha has started 2010 as she finished 2009 - on top of the U.S. album charts!

The singer's TiK ToK has scored a third week at number one on the Billboard Hot 100 chart, keeping Lady Gaga's Bad Romance off the top.

But there's good news for Gaga on the Billboard Pop Songs chart - Bad Romance has climbed to the top of that countdown, making her the first artist in the 17-year history of the hit list to take her first five singles to the top.

Lil Wayne scored the new chart's only debut - Drop the World, which features Eminem, enters the countdown at 18.

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