Pussycat Dolls Perform When I Grow Up (Without Nicole)

Yes, you haven't misread this post, PCD performed WIGU live at Pure Vegas and as you can see in the video, Nicole isn't there. The song actually sounds really good without her. I think there may be an album version of the song which isn't just Nicole seeing, I mean it seems strange they'd know all the words, when they aren't supposed to sing them:

What did you think of the performance?