Spin-off shmin-off. Let's talk Grey's Anatomy proper. The popular rom-dram looks like it will wash away its Season 3 backstage troubles and on-screen waterski-flirtations with a May wedding for Christina and Burke. Judging by pics and sightings at JustJared, Katherine Heigl's Izzie is in attendance as a bridesmaid, while Ellen Pompeo's Mer appears suited up as MoH. What's more, Sara Ramirez's Callie seems to have RSVP'd for the possible vow-swap, suggesting George has yet to come clean on his Izzie-discretion. O'Malley, you dawg!