Rihanna Dating 90210 Star Tristan Wilds !

Rihanna has reportedly moved on to a new guy and it's '90210' star Tristan Wilds.

According to the NY Daily News, Tristan Wilds was a guest at a party RiRi held over the weekend at her L.A. home.

"No one knew why Tristan was there initially, because it was not an industry party - it was very intimate," says a fellow guest. "But everyone quickly realized they weren't meeting for the first time, because they were openly affectionate for everyone to see."

"From the moment he walked into her party, Rihanna lit up," the snitch adds. "They'll keep in touch while she's away. They're already planning to use iChat and Skype to stay in contact until Tristan finishes shooting '90210' for the season and can fly out to meet her on the road."

Rihanna, 21, and Tristan, 20, were introduced by a music producer who has worked with both of them.

Tristan is currently working on an album of his own. He has also starred in "The Wire" and Jay-Z's "Roc Boys" music video.

Here's Rihanna after a night of partying at Mahiki nightclub. She almost suffered a wardrobe malfunction and showed off the cellulite on the back of her legs while trying to get into her car .