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Oliver Miller of AOL's Inside TV reports that Ke$ha's "Tik Tok" opened up last night's episode of "The Simpsons."

The song starts with "wake up in the morning feeling like P. Diddy" and Diddy then adds a couple of ad-libs as her verse develops. On "The Simpsons," Ke$ha's vocals are kept and lip-synched by Lisa Simpson, but the voice of Bart Simpson recites Diddy's ad-libs. Check out the clip below.