While there are many many great performances there also quite a few that were really bad. These really bad performances involve pretty much all of Will's songs (especially the rap ones).
Will trying to be cool was just awful and there was a time I couldn't take it and had to skip it. Another terrible song was when Sam sang Coppacabana. PLEASE HELP. Also let's not forget about Blaine's 'You're my best friends' or whatever. The time he sang with those creepy ass puppets. Like wtf. There were also many terrible Artie songs, but I so didn't care for Artie that I can't remember a single one.
So ya these are the worst ones I may have forgotten a few but this is enough. After remembering these Run Joey Run seems like a pretty good song TBH.