What an exciting day for Selena Gomez! She turns 18 today and a big celebration is headed her way. The plan is for all of her friends and family members to attend a huge party with karaoke at Sel's L.A. house. The birthday excitement doesn't stop there - last night on the set of Late Night with Jimmy Fallon, Sel was surprised with a huge red velvet cupcake! Don't forget to go to the movies tomorrow and watch Selena star in Ramona and Beezus!