LOS ANGELES (Reuters) - In a sumptuous princess ceremony that shut down Disneyland, Mariah Carey and her comedian husband Nick Cannon renewed their weddings vows and celebrated the second birthday of their twins. Wearing matching Cinderella and Prince Charming-style costumes, and riding in a horse-drawn crystal carriage, the "We Belong Together" singer and the "American Idol" judge tweeted photos and video of the celebration on Tuesday night at the southern California theme park. "On our way to renew our vows. I love you Nick Cannon shut down Disneyland," Carey tweeted. ...