"Extra" correspondent Adrianna Costa caught up with Demi Lovato, 18, at the HTC Status Social Launch event, hosted by singer Usher, where she asked about rumors that Demi is dating Ryan Phillippe, who is 36.

"No, I don't even know where that came from," said the 18-year-old actress/singer.

She was excited to see Usher at the event. "Usher is hot!" she gushed.

Lovato dated singer Joe Jonas for a year beginning in 2009 and was recently linked to Wilmer Valderrama.

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