Counting down from most to least believable.
Mila Kunis and Angelina Jolie in "Gia"
Source: myspace.com / via: hotflick.net
Blake Lively and Robin Wright in "The Private Lives of Pippa Lee"
Source: hotflick.net / via: fanpop.com
Joseph Gordon-Levitt and Bruce Willis in "Looper"
Source: altfg.com / via: moviecarpet.com