Katy Perry Back to No. 1 on U.K. Singles Chart

Katy Perry has followed up her double win at the People's Choice Awards on Wednesday night, January 5 by returning to the top of the U.S. pop charts. The star's "Firework" claims a fourth non-consecutive week at number one after trading places with Bruno Mars' "Grenade".

Perry picked up Favorite Female Artist and Favorite Online Sensation honors at the People's Choice Awards. The rest of the Billboard Hot 100 top five is unchanged from last week with Ke$ha's "We R Who We R", Rihanna's "What's My Name" and "Raise Your Glass" by Pink all holding firm at three, four and five, respectively.

Big Time Rush score the chart's highest debut honor by bowing at 79 with "Big Night".

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