Model Kate Upton denied dating Sean "P. Diddy" Combs earlier in April and it is because she is dating Justin Bieber's best friend, King Kevi, according to a source.

An insider close to the couple told Hollywood Life "Kevi and Kate have been hanging out for a while" and that they spent a lot of time together.

"At every party, he has a lot of girls hanging around him, but when he is with Kate, he just wants to be with her," the insider added. "It's a low key thing. She doesn't want to be in the spotlight, and neither does he. They are really into each other though."

His relationship with Upton is the first time Kevin has "really cared about a girl," according to the source, and the Sports Illustrated model has even been to his house a few times already.

It has not been confirmed when the two reportedly started dating but the source added that they will not go public with their relationship, choosing to keep things "low key" and that "they don't want titles."

Gossip Cop said it received the same "tip" about Upton allegedly dating Kevi, but noted that the rumors are false.

Upton, 20, broke up with Detroit Tigers pitcher Justin Verlander in February. When asked about reports of her "sucking face and dining out" with Diddy, she replied, "Not true at all." Kevi, a rapper/producer, earlier in the month denied reports that he had relations or was spending time with Bieber's ex-girlfriend Selena Gomez.