"What a Difference a Day Makes" Sneak Previews

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Our favorite show's 99th installment last night was terrific. Below is a sneak preview for next week's landmark 100th episode of Grey's Anatomy, "What a Difference a Day Makes."

It's the day of Meredith and Derek's wedding and the bride-to-be is feeling a bit nervous about what's to come. Her maid of honor isn't exactly helping calm her nerves ...

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Follow the jump for the 30-second promo that aired after last night's show, as well as another sneak preview of the episode featuring the wedding-obsessed Izzie Stevens.

After begging Bailey to let her attend the big event in spite of her deteriorating condition, Izzie starts to experience some familiar symptoms. Handsomely familiar ...

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[video url="http://www.tvfanatic.com/videos/what-a-difference-a-day-makes-promo/" title="What a Difference a Day Makes Promo"] [/video]

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.

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Grey's Anatomy Quotes

Arizona: Oh my God! I mean, I understand why you're into her. She's hot. Wait, she likes you?
Nathan: What? I mean, I'm going to try not to be offended at that.
Arizona: No, no, no. It's just that Derek was--Derek was epic for her. They were the great love story. I mean, that girl's heart beat for Derek Shepherd. It just...it never occurred to me that she would ever be with anyone else. He was perfect. He was everything. That man turned her world. It...I spooked you. Don't be spooked.

MEREDITH: "You don't get to call me a whore. When I met you, I thought I had found the person that I was going to spend the rest of my life with. I was done! All the boys and all the bars and all the obvious daddy issues, who cares? I was done. You left me. You chose Addison. I'm all glued back together now. I make no apologies for how I chose to repair what you broke. You don't get to call me a whore."
DEREK: "This thing with us is finished. It's over."
MEREDITH: "Finally."
DEREK: "Yeah, it's done."
MEREDITH: "It is done."