Greenberg. The poster is at left, and this one is just a dramatic/super-funny depiction of a New Yorker who goes to LA to house-sit for his brother and ends up falling for his brother's assistant. At its heart, Greenberg is a romantic comedy, but its wry humor and angsty moments add lots of layers.
Hot Tub Time Machine. Absurd back-in-time premise turns out to be heartwarming and utterly side-splitting.
Get Him to the Greek. If only for the scene with Diddy and his family, where the kids and Diddy start chanting, "It's Biggest Loser time! It's Biggest Loser time! It's Daddy's favorite show! It's Daddy's favorite show!"
Okay, so which other movies made you LOL this year? I bet Easy A is on lots of lists--I haven't seen it yet, but I want to!