Blake Lively dressed down and Rihanna partied it up at NYC's Abe and Arthur's with the cast of SNL following both of their appearances on the show. Rihanna was on the program to perform, but she also starred in one of Andy Samberg's digital shorts — the end product was the hilarious song, "Shy Ronnie." Blake was the evening's host, and she raised a few eyebrows with a sketch that lampooned Tiger Woods's recent domestic issues. Penn was by her side for the late night festivities, supporting another of his girlfriend's endeavors.
To see more of Blake and Rihanna, just