Happy September 2nd, 2010... a.k.a 90210. In honor of this glorious occasion we thought we'd do what we do best: celebrate unique days with hot girls and 90210 definitely has a few. We've take the cast of the new 90210 and put them up head to head with the cast of the old. And while the new version may not have the youthful sexiness of Shannen Doherty and Tiffani-Amber Thiessen, the new chicks are so fly, you might sprout wings just watching them. But when it comes down to which season was hotter, we're leaving that up to you!