"Kelly is single, but she's having a lot of fun. She's been hooking up with Quincy, her really good friend lately," the source told Us. "It's not serious but he's really hot and he's very into her!"
Back in April, Combs, 23, posted a picture of himself with the E! Fashion Police co-host, 29, via Instagram. "With the oh so eccentric @kellyosbourne!!" he captioned on April 17. (Sean "Puff Daddy" Combs is Quincy's informal stepfather. Quincy is the son of Sean's on-again, off-again girlfriend Kimberly Porter and singer-producer Albert Joseph Brown III, a.k.a. Al B. Sure. Combs recently went back to the name Puff Daddy this month after being called P. Diddy since 2001.)
Osbourne, however, isn't tying herself down. Ozzy and Sharon Osbourne's younger daughter also has her eyes on a 27-year-old British model named Ricki Hall, according to the insider. The pair have been messaging via social media.
"They recently started following each other on Instagram. He's got a a huge beard which Kelly finds really sexy, she loves guys with beards!" the source told Us. "She's definitely interested in seeing where it goes with him."
Osbourne's latest hookup comes five months after Us exclusively broke news that she called off her engagement to fiance Matthew Mosshart last January. The couple first met in the summer 2011 and got engaged in July 2013.