Britney Spears is officially hooking up with her backup dancer, Chase Benz. OK! magazine is now reporting Britney is doing this to make Kevin Federline jealous. Yeah. Good luck, Brit Brit. Some spies told the magazine that Britney and Chase have been making out all over the place and even were locked in a bathroom stall together for a whole 9 minutes.

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more Britney Spears photos after the hop…

But poor Chase might just be a jump-off until she gets K-Fed back. OK! reports: