Heather Graham wears the beautiful Dita Wonderlust sunglasses in the 2009 movie The Hangover. This movie is loaded with interesting sunglasses (see all sunglasses in The Hangover), but Heather Graham makes them look the best!
The Wonderlust, released in 2005, is a fine and stylish model from Dita and lately many celebrities have been spotted wearing this, including Paris Hilton. The Wonderlust is available in 4 different color combinations.
Reference: Dita Wonderlust - Color: White Gold frame and Dark Brown Gradient lenses (code 8400A)