John Mayer Starts a Tweet-Off with Ke$ha

John Mayer let his affection be known over the weekend by starting a little Tweet-off with his new female addiction — pop singer Ke$ha.

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John sent a Tweet of love to Ke$ha over the weekend, but later came up with a couple of critiques of her "Tik Tok" song to Tweet.

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John also directed one of his Tweets towards Ke$ha's secret fans — the ones who love to hate her!

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On Sunday,  John finally got a Tweet back from the pop singer!