'Glee's' Darren Criss On His Duet With Katy Perry: 'It Was A Treat!'

'Glee's' Darren Criss On His Duet With Katy Perry: 'It Was A Treat!'

Darren Criss chats with Access at the 2011 FOX Winter TCA party about his “Teenage Dream” duet with Katy Perry in early December 2010. What was it like taking the same stage with Katy? Plus, with whom would he like to collaborate next?