Round two of our Bikini Bracket ends tonight, so there's still time to cast your vote in the closest matchups! Carmen vs. Megan, Gisele vs. Marisa, Gwen vs. Taylor — who are you going to choose? In case you missed it, for the month of July, we're narrowing 64 finalists down to number one in a competition of who has the hottest celebrity bikini body. All you have to do now is place your last-minute second-round picks, and we'll be posting updates on the action. At the end of the month, we'll have our champion. Here's the best part — one lucky voter will also win one of the hottest gadgets of the season, a new iPhone 4! You will be entered for each round you complete, so the more rounds you play, the more chances you have to win. Remember, you must be logged in to be entered. See the official rules and click here to get started — happy voting!