While we’re all excited the weekend is upon us, we’re even more pumped that today is officially the first day of summer—woohoo! How have celebs celebrated this special day? Lea Michele and Cory Monteith were spotted arriving in Los Angeles from a trip to New York and Jennifer Lopez received a Hollywood Walk of Fame star. See what else Jordin Sparks, Teresa Giudice and Isla Fisher were up to below in our OK! Quick Pics!