We are in the Kate Upton era of bikini modeling, gentlemen. Barely 20 years old, Upton's body of work already competes with the legends—the Elle MacPhersons, Kathy Irelands, and Tyra Bankses. Not only has today's definitive blonde bombshell already captured the cover of the Sports Illustrated's Swimsuit Issue and GQ, but she's also nestled in the hearts of every last American male. 

How long will the Kate Upton era last? Forever, we hope. For now, enjoy her 30 hottest bikini shots—so far.