Happy Memorial Day! In honor of the unofficial start of Summer, we're curious as to what you're most looking forward to this season. There's so much going on, with some of 2011's biggest movies, like the final Harry Potter, Green Lantern, and X-Men: First Class, arriving in theaters. Many of our favorite celebs will take amazing vacations such as Jennifer Aniston in her beloved Cabo, and that just might give some guys a chance to go shirtless — fingers crossed Robert Pattinson is among them! Finally, there are plenty of birthdays to celebrate. Knox and Vivienne Jolie-Pitt, for example, will turn 3 on July 12. With so many options, what are you most looking forward to this Summer?