Criss and Colfer perform together at Royal Albert Hall after decade apart

Darren Criss brought Chris Colfer on stage at Royal Albert Hall on Oct. 18 for their first performance together in more than a decade, according to Billboard. They sang "Baby, It's Cold Outside", featured in Glee's "A Very Glee Christmas". The Glee version reached No. 57 on the Billboard Hot 100, the singles chart in the United States, in 2010.