What are some things about Sandra Bullock you wouldn't know just by looking at her? "She's a catalog of old hip-hop tunes -- it's incredible," reveals her Proposal costar Ryan Reynolds. "And she looks terrific naked."
The longtime pals -- they even vacation together with spouses Jesse James, 40, and Scarlett Johansson, 24 -- let it all hang out in the romantic comedy, out June 19, in which they play a boss from hell and her long-suffering assistant whose relationship changes when she schemes to avoid deportation to her native Canada. Bullock, 44, and Reynolds, 32, sat down with PEOPLE to laugh about the movie, each other and about baring it all.