Rising star Jessie J has jumped straight to the top of the charts with her new single Price Tag.
It's her first number one hit as her debut single - Do It Like A Dude - only reached number two last year.
Jessie pushed Ke$ha off the top spot to number three, but Bruno Mars hung on to second place with Grenade.
It looks set to be a great year for Jessie - she's already scooped a Brit Award and has been named the BBC Sound of 2011.
In the album chart, Adele has kept the crown for another week with her album 21, but Bruno Mars has slipped down to third place.