While Kim Kardashian was getting married to her new beau, Kris Humphries, her former boyfriend and the guy who made her famous was out with his new boo. Ray J was spotted in Las Vegas on a dinner date Sugar Factory American Brasserie with Olivia Alvarez celebrating her birthday.

Rumor has it that Ray J sent a text message to Kim saying, “And to think you really have to thank me for all this ;-),” making reference to the sex tape that they made together that put Kim Kardashian on the map. That night, Ray J performed at the Chateau Nightclub and Gardens and brought his whole entourage.

Here are pics below:

Spotted @Necole Bitchie