 Perry expressed approval of the cover of her song , " Teenage Dream " , through the social networking website Twitter . Harper found the choreography uncomfortable viewing , and Hanh Nguyen of Zap2it agreed that the performers appeared to be " rockin ' out a bit too much to it " , but felt that the song worked " remarkably well " overall . Futterman deemed it the best song of the episode , and appreciated that it was more understated than numbers performed by rival glee club Vocal Adrenaline during the show 's first season . Stack went further and called the performance one of his favorites on Glee ; he enjoyed the choreography and arrangement and graded it " A + " . Benigno again gave the song an " A " ; he called it " flawless " and an improvement on Perry 's original . In December 2012 , TV Guide named the rendition one of Glee 's best performances . 
