'Glee' star Darren Criss led the Warblers in a live performance of Katy Perry's 'Teenage Dream' this week on 'The Ellen DeGeneres Show.'

McKinley High's rivals, the Dalton Academy a capella Warblers, hit the talk show's stage to promote their new studio release, 'Glee: The Music Presents the Warblers.' The new album features 11 of the Warblers' most popular covers -- including Destiny Child's 'Bills, Bills, Bills' and P!nk's 'Raise Your Glass.'

After the performance, heartthrob lead singer Darren Criss, who plays Warbler frontman Blaine on the hit series, sat down to chat with Ellen about everything from performing on stage with Katy Perry to the 'Glee' cast's summer tour. The 24-year-old actor even gave the talk-show host her very own Dalton Academy blazer.

Criss' appearance on 'Ellen' follows the recent announcement that the Billboard cover boy will pursue a solo career and release his own album with Sony. Meanwhile, Criss and the Warblers continue making the talk show rounds this month -- after the jump, see the singing group's appearance on the 'Today' show. First, check out the 'Ellen' performance here: