Below is a sneak preview clip from this week's all-new episode of Grey's Anatomy Season 4 Episode 13, "Piece of My Heart." Izzie, Cristina, Meredith, George and Alex talk about feelings... or try to at least. Just like old times. Great line at the end, too...

Follow the jump for two more great video clips from this upcoming episode, one of which involves a classic Seattle Grace elevator scene with Derek and Meredith... and Addison. And Rose. And Mark. Priceless expression and comment.

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