After years of speculation, it's safe to say that Cassie and Diddy are an item. The couple pretty much made it official by sharing some PDA on Twitter. Over the weekend, the Diddster instagram'd a photo of Cassie along with the caption, "I'm a very lucky man #knowthat."

The R&B songbird soon followed back with her affections for the rap mogul. She tweeted, ".love.him" with a photo of Diddy on a jet ski. Cassie must be smitten if she going to enclose the word love with two periods. We think this positively confirms their relationship.

If you need further proof, check out Cassie's photoshoot with GQ magazine. The title of the article is a clear giveaway also -- "Diddy's Girl." The 'Me & U' singer heats up the pages of the magazine with her smoking hot body as she sweats it out for the camera. Cassie (real name Casandra Elizabeth Ventura) looks toned and sexy in her one-piece bikini and stilettos. Her sweaty workout was captured by photographer Christian Anwander.

In the interview, Cassie is asked about her upcoming album, which is her second in over six years. "It's been too long, I know, but I got to start over and over again," says the 26-year-old about the long delay between albums. "It would be awesome to stay popular, but if I was only an underground artist, I would be okay with that."

With Diddy guiding her career the second time around, Cassie is ready to take on the world again. "I feel like I'm a new artist," she says.

Diddy is one lucky guy!


Watch Cassie's Video of Her Photoshoot with GQ Magazine