Dunno if the titles explains it clearly enough. Basically, what movies have you found a specific actress looks much better than in her other movies? Not sure if pics. 2 right of the top of my head are Cameron Diaz in "The Mask" and Liv Tyler in "One Night at McCool's".
just a few more i can think of: Sarah Michelle Gellar - Cruel Intentions Demi Moore - Disclosure Jennifer Garner - Daredevil Jamie Lee Curtis - True Lies Jennifer Love Hewitt - Heartbreakers Angelina Jolie - Lara Croft Tomb Raider Kristen Bell - Forgetting Sarah Marshall