It's summertime, and we love seeing all our favorite stars hit the beach or lounge by the pool in their swimsuits. Last year Bar Refaeli reigned supreme in our first annual bikini bracket, and now we're doing it again! For the month of July, we'll be narrowing it down to number one based on how you vote on all the amazing celebrity bikini bodies. All you have to do is place your first 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!