Katy Perry's Dark Horse gallops to a fourth week at number one

Katy Perry has kept another 2014 BRIT Awards performer off the top of the pop charts as her Dark Horse continues to gallop to victory.

Perry performed the hit onstage at the O2 Arena in London on Wednesday (19Feb14) as Billboard Hot 100 chart compilers back home announced the track had held onto the top spot for a fourth week, keeping Pharrell Williams' Happy in second place.

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Williams will be hoping to take over at the top of the charts next week as he prepares to perform the Despicable Me 2 tune at the Oscars on 2 March (14).

Meanwhile, Jason Derulo's Talk Dirty stays put at three and A Great Big World and Christina Aguilera's Say Something and Drunk in Love by Beyonce - another BRIT Awards performer - round out the new top five.