Marisa Tomei topless in one of the nude scenes that earned her two consecutive second-place finishes in our annual polls:
This performance finished second in the Top Nude Scenes of 2007
Her follow-up in The Wrestler merited second place in the Top Nude Scenes of 2008
By the way, she did those scenes when she was well into her 40s! (She turns 54 this year and still looks about the same.)