red carpet tattoo london o2 arena Rihanna MrPaparazzi

Rihanna dazzled at the Brit awards last night, but before she flew to London to collect her prize for International Female Solo Artist, the starlet was in LA for the Grammys. And get this -- when RiRi attended the Gucci/Roc Nation brunch at Soho House on February 12, Ryan Phillippe hit on her, and the R&B starlet reportedly rejected him!

"He said something to the effect of, 'What are you doing tonight?' and she signaled 'sleep,'" a source tells Us Weekly. "She was trying to be polite, but she was genuinely not interested. When a couple of her friends came up to join the conversation, he just walked away."

Phillippe and on-again/off-again flame Amanda Seyfried were spotted having an "intense conversation" at the Chateau Marmont a few days earlier, and a source tells the mag, "[Their relationship is] casual. They're friends who hang out romantically from time to time and that's it. At one point, there was a chance it would develop into something more serious, but it never did. There's no commitment."