STAGE TUBE: GLEE's Criss and the Warblers Perform on Ellen

GLEE star Darren Criss led the Warblers in a live performance on ‘The Ellen DeGeneres Show," singing Katy Perry's 'Teenage Dream.'

The Dalton Academy a capella Warblers took to the stage to promote their new studio release, 'Glee: The Music Presents the Warblers.' The new album features 11 of the Warblers' popular covers.

After the performance, Criss sat down to talk to Ellen about performing on stage with Katy Perry to the GLEE summer tour. Ellen was even presented with a Dalton Academy blazer.

To watch the Warbler's performance on Ellen, click below.