Rookie of the Year voting is underway and the race is as close as ever.

Rookies Erin Heatherton and Rose Bertram may be in the lead now, but with an entire week left to vote, who knows what could happen! 

If you're smitten with Robyn Lawley's oh-so-hot curves or weak at the knees when you spot Kelly Rohrbach's golden tresses, now is the time to exercise your right to vote. Head over to the SI Swimsuit 2015 page to weigh in, and be sure to check back when the winner is announced next week!

Happy voting!