Perez Hilton tells MTV News a Summer Diva is ‘defined by one thing: she is known by just one name.’ By Jocelyn Vena Britney Spears Photo: Getty Images Every summer, there’s one lady who rules the beach, one pop diva who manages to rise above the rest thanks to a catchy tune and unstoppable promo campaign. Since the summer basically starts on the Fourth of July and goes right through Labor Day weekend, it’s time to start looking at the most likely contenders for the Summer Diva crown. With everyone from Lady Gaga and Beyonc
