Charli XCX Explains Why She Didn't Do Britney Spears' Remix for 'Slumber Party'

A fan asked Charli XCX a question on Watch What Happens Live that left her impressed by the inside knowledge the fan had!
The 29-year-old singer appeared on the late night talk show’s latest episode, which aired on Thursday (March 3).
A fan asked if it was true that Charli was Britney Spears‘ first choice to appear on the remix for “Slumber Party.”
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“Whoa, that is some knowledge right there,” Charli replied. “Yeah. I don