"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

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."

Did you say it? 'I love you. I don't ever want to live without you. You changed my life.' Did you say it? Make a plan. Set a goal. Work toward it, but every now and then, look around; Drink it in 'cause this is it. It might all be gone tomorrow."

Meredith (closing voiceover)