The Australian Open is the first of the four annual Grand Slam tennis tournaments. The two-time defending women’s singles champion Serena Williams is out, but her sister Venus is in. The jury’s still out on the Williams sisters’ hotness. Some guys prefer the stockier build while others opt for the more feminine physique like those featured in our Babes of the US Open 2010 galleries: Maria Sharapova, Mandy Minella, Carolina Wozniacki, and Victoria Azarenka, to name a few. Venus’ short dress has caused quite the buzz lately. So much so it prompted us to put together a collection of our favorite butt shots. Butt? Butt what? Exactly. Double love. Advantage YOU.