Rihanna vs. Beyonce – Hottest Star of 2013, Round 1

UPDATE: This poll has closed, and Rihanna won! Vote for her in the semifinals here.

Rihanna and Beyonce, two of music's most smoldering ladies, are up for the title of Hottest Female Star of 2013. In this fan-voted competition, eight female will go head-to-head in duels, as will eight males, in order to crown the Hottest Star of 2013. So, who gets your vote in this versus battle -- RiRi or Bey?

Rihanna is all about flaunting her toned body, whether it's dancing on stage or posing suggestively for her Instagram pics. The singer even performed at the Victoria's Secret Fashion show last winter! If you're still not convinced of her sex appeal, just give 'S&M' a listen.

There's no doubt that Beyonce has ruled 2013. From her leather-clad halftime show at the Super Bowl to her dance-heavy Pepsi commercial, Queen Bey is constantly reminding us that it's her world and we're just living in it. Would you expect anything less from the woman who coined the term "bootylicious"?

Which singer is turning up the heat this year? Rihanna or Beyonce? You can vote up to once per hour below until this poll closes on Aug. 30, at 2PM ET.