Glee hottie Darren Criss is hard at work as the popular series hits the streets of New York City to film its last batch of season two episodes. Criss managed to find some free time from his Big Apple adventures to swing by Rolling Stone's studios and perform some tracks from The Warbler's new album, including Neon Tree's radio hit "Animal" and medley of Maroon 5's "Misery" and "This Love." Criss also chatted about the suprise success of his onscreen a cappella group and preparing for the upcoming Glee tour. Take a look below!