Looks like the tabloids will have to change their cover story: Kate Upton and Puff Daddy aren't dating, at least according to the stars themselves. The Sports Illustrated swimsuit model denied rumors Wednesday that they were seen “sucking face” at a club in Miami last month, tweeting, “Really??? Not true at all.” P. Diddy also took to Twitter to squelch the alleged lies: “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!” So much for getting our hump-day kicks.