The Week Of stars, Chris Rock and Adam Sandler, stopped by Monday's episode of The Tonight Show, where they dished on recent celebrity encounters. Rock recalled the time Rihanna "uncle-zoned" him when he tried to hit on her. "She looked at me like I was one of her aunts," Rock declared. As for Sandler, the comedian boasted about meeting Justin Bieber a few times and how the pop star has been always nice to him and his family. "He's a very nice kid. Very nice to family, like says hi to my kids," Sander noted.