Jennifer Aniston turns 46 today!Sure, the birthday girl's been and American sweetheart since her Rachel days in Friends. But look closely, and you'll see little has changed—same gorgeous smile, same rockin' bod and same obsession with LBDs. After all, Jen's the reigning queen of black dresses. And when she's not rocking her beloved noir, odds are she's wearing white, beige, gray or any other neutral tone. Back to her staple sweet frocks, Jen picked a fittingly saccharin coral Calvin Klein design for a Cake promotional event. She heated things up in a fiery Valentino ball gown at the 2013 Oscars, and kept her style streak going with a goddess-like Donna Karan gown in 2010 (which yes, was beige, but was also exceptionally gorgeous)..