Happy Birthday, Kate Upton: 21 Awkward Twitter Pickup Lines

Sports Illustrated swimsuit covergirl Kate Upton turned 21 on Monday, and Twitter was full of wonderfully awkward pickup lines from her smitten fans

Upton, of course, is no stranger to causing a stir on social media. There's the time she tweeted a photo of a Russian doppelganger, sending male admirers the world over into hysterics. There's the time a Final Four hero used his moment in the spotlight to hit on her via Twitter. Then there's the enterprising young man who made a YouTube video asking her to prom (she declined, but he bagged another model instead)