Kurt is Magic

[silveriafirestr.livejournal.com]

Hi someone just mentioned on one of the comms a fic where when Kurt and Rachel duet to wicked in New York and Kurt waves his had and the music starts that he did that in reality and Kurt is magic. Rachel tries to convince everyone else but it doesn't work. If any one knows of this fic and could link me to it that would be wonderful as it sounds like a great read.

Kurt sings multiple parts in a song, then declines singing getting a part and leaves...

[junnights.livejournal.com]

I've been searching for a specific story with this scene, all I remember is that the Glee club are arguing about a specific song where Rachel wants the female part... as the 'obvious' choice. Kurt argues, and performs both parts (its a duet I think) quite brilliantly. Mr Schue is stunned and so is the rest of the Glee club (with the exception of Puck)... a comment is made that it sounded/looked like he had multiple personalities or something similar. Mr shue then offers to let Kurt choose which part he wants to sing... but, having made his point, Kurt leaves (and Puck follows?? I think so).  Everyone is shocked and Puck is pretty pleased or something. 
I'm pretty certain its a Puck/Kurt friendship.. maybe they get together at some point too, but I don't really remember. ... 
Help?