‘Glee’ reunion: Chris Colfer joins Darren Criss onstage to perform ‘Baby It’s Cold Outside’ during London concert

According to Variety, Darren Criss surprised audiences at his one-night-only concert at the Royal Albert Hall in London by bringing out Chris Colfer to perform Baby It’s Cold Outside.

The duet served as an homage to their characters on the hit show, Kurt Hummel and Blaine Anderson.