And the May sweeps weddingpalooza continues.... On May 5, Grey's Anatomy's Callie and Arizona celebrate their fairy-tale wedding, which is held in the woods, officiated by Miranda and boycotted by one bride's disapproving parent. (Mark steps in to save the day.) But what I'm more curious about is why Derek and Meredith are no-shows. Rumor has it they may be legalizing their Post-it-note marriage to speed up an adoption process. "I don't know if the whole thing goes through," says Chyler Leigh, whose character, Lexie, "would be ecstatic to be an aunt."