Crystal Bowersox Performs 'Summer Wind' on 'American Idol'

Summer Wind is likely the most obscure tune we'll hear tonight, and Crystal just might be turning it into a new Idol favorite.

She gives it a subdued performance, at least to start, and Connick's arrangement perfectly complements it, nudging Crystal to build it a little as she goes along. It's the arrangement that pushes Crystal farther out of her musical element than she has been so far, and she responds marvelously.

Randy thought it was a little sleepy.

Ellen thought she was swallowing words at first, but then saw her open up. But she says wouldn't know she was that other girl if she was seeing her for her first time.