Justin Timberlake [1] better watch himself, because Nina Dobrev [2] just brought sexy back in a big way. The Vampire Diaries actress broke out some serious moves during her sultry appearance on Lip Sync Battle [3], where she performed Marvin Gaye's "Let's Get It On." Much to the delight of the audience and her challenger for the evening, Tim Tebow, she made sure to get up-close and (very) personal with one of his legs. Will she be able to out-sexy Kaley Cuoco's hot rendition of "I'm a Slave 4 U" [4] from last week? Watch the preview of Nina's jaw-dropping routine above to decide, and then check out her episode when it airs on Thursday at 10 p.m.!