A Steak Through the Heart?

4/17/2007 12:06 PM PDT

A Steak Through the Heart?

R&B superhottie Rihanna was spotted on a dinner date with "You Got Served" actor Omarion last night-- but she says she's not his shorty. Oh no?

The two have been a rumored item, and TMZ caught them leaving Mastro's steakhouse in Beverly Hills -- just minutes apart -- coincidence? Maybe, but still meaty.

While Omarion wasn't talking, the Barbados bombshell denied the gossip, telling our cameras they're "absolutely not" dating.

Despite the fact they left separately, sources tell TMZ they saw the pair entering the hotel where Rihanna is staying -- together! The singer is reportedly in town recording tracks for her upcoming album.