April 11th, 2013
11:13 AM ET
On Wednesday, The New York Daily News said that Upton, 20, had been spotted "sucking face" with Diddy, 43, at a Miami nightclub on March 24.
An onlooker told the paper that "they were kissing, [and] they weren't hiding it."
The romance rumors heated up earlier this month when Upton, who was previously attached to Detroit Tigers pitcher Justin Verlander, was seen having "an intimate dinner" with the hip-hop mogul in New York last week.
And yet, while we were so ready to use the new nickname "Diddyup" in honor of the pairing, both stars have denied the reports.
"Really???" an incredulous Upton tweeted Wednesday, regarding the report that she'd been spotted "sucking face" with the music star. "Not at all true ..."
Diddy backed her up, tweeting, "Attention all Media. I don't even know Kate Upton personally! I'm not dating her! What's being reported is not true. END of story!"
Never one to miss an opportunity for promotion, though, Diddy quickly added that "it is true" that Cassie - another reported romance of his - has a new mixtape arriving Thursday.
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