Cameron Diaz isn’t hiding out following her split with Alex Rodriguez. She partied with Sean “Diddy” Combs while closely guarded at Catch on Monday night. A spy reports, “Cameron and Diddy were surrounded by security in a private booth.” The two are said to be good friends, and Diddy is still with his longtime girlfriend Cassie. Also there were Nas, Maxwell, Cuba Gooding Jr., Brian Greenberg, Lake Bell, Jeff Gordon and NBA star David Lee.