It's only been roughly three months since Demi Lovato confirmed her breakup with long-term, on-and-off-again boyfriend Wilmer Valderrama, and it looks like he's already moved on. According to E! News, Valderrama has been dating ex-girlfriend Minka Kelly again. The key word here is "again." When did these two ever date? We rounded up a few other celebrity romances that were kept on the low!
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--Additional reporting by Sugey Palomares
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