Just five months after being named Sports Illustrated's Swimsuit Rookie of the Year, 19-year-old Kate Upton is already proving that she's more than just a bountiful bikini filler. Oh wait, no, that's still all she's really doing as star of the new SoBe ad, in which a guy is challenged not to "break the horizon." (You can attempt the challenge yourself on SoBe's site.) Recently teased on Pandora, the attention-grabbing national ad is likely to give Upton a bit more name recognition among groups other than frat boys, mechanics, and aficionados of "The Dougie."