Katy Perry has landed a third week atop the U.S. pop charts with her California Gurls.
For a second week running, the Billboard Hot 100 top four consists of Perry, Usher's OMG, B.o.B's Airplanes and Billionaire by Travie McCoy - each track maintains its spot.
And Drake rockets into the top five at five with Find Your Love - a day after his debut album Thank Me Later entered the Billboard 200 at number one.
The hip-hop sensation also lands the top three entries in the new chart, beginning with Up All Night at 49.
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