The competition for 2010's Hottest Bikini Body has been fierce and it's down to two — Brooklyn Decker and Jennifer Aniston are facing off in the last match! Jennifer narrowly missed the finals last year after being defeated by Jessica Alba and Brooklyn's an amazing first-time competitor. The ladies got friendly as costars on the set of Just Go With It, where they also donned two-pieces in separate scenes, but in this matchup only one of the toned beauties can come out on top. Fill out your bracket for a chance to win an iPhone 4 — remember, you must be logged in to be entered, see the official rules here — and help us crown our 2010 bikini queen. Vote now before the competition ends today at midnight!