Rihanna cozies up to Lohan's ex

R&B star Rihanna, who is reportedly taking time off her tumultuous relationship with singer Chris Brown, was seen getting close to Lindsay Lohan's ex-boyfriend Wilmer Valderrama.

The star, who has stepped back into the public eye after the infamous assault episode with Brown, was seen getting "pretty cosy" with the "The 70s Show" star Valderrama at Hollywood hotspot 'Geisha House', Mirror online reported.

Valderrama hosts weekly karaoke nights at the club and reportedly approached Rihanna as soon as she walked in.

"Rihanna looked so pretty and Wilmer could hardly take his eyes off her. They were chatting and laughing for ages. They looked pretty cosy and relaxed in each other's company. Wilmer was all charm and even had a bottle of champagne for Rihanna," a source told the newspaper.

Valderrama has previously dated celebrities like Lindsay Lohan, Paris Hilton, Ashlee Simpson and Mandy Moore.