Nick knows the words of Miley's song Party in The USA.

Joe Jonas fan Party In The USA:

 Joe Brought this girl on stage tried to get her to sing a Jonas song she didn't know the words he asked her her favorite song & she said party in the usa. Joe didn't know the words but he tried when he was done he said that Nick knew it. 

Thanks Stephani

 

Some Pictures From The show:

Thanks To whoever sent me the pictures :)