Forget singing ‘Wake me up when September ends’ as it’s party time for several Hollywood stars who are celebrating their birthdays this month. While singer Beyonce Knowles turned a year younger (in looks) on her birthday on September 4, she is joined in by other Hollywood hotties like Gwyneth Paltrow and Cameron Diaz who will be bringing in their birthdays in the same month. Not only this, Hollywood hunks like Ben Affleck and Will Smith too will be turning a year older along with them. Check out the celeb birthdays lined up this month that will surely make you want to wish them “Happy Birthday”.