What Frank Loesser song was covered on Glee: The Music, The Christmas Album?
Glee: The Music, The Christmas Album:  Critical reception has been mixed, with the majority of professional reviews praising the cover version of "Baby, It's Cold Outside" performed by Chris Colfer and guest star Darren Criss, as well as the vocals of Lea Michele and Amber Riley, but questioning the arrangements of some other tracks. Baby, It's Cold Outside: "Baby, It's Cold Outside" is a song written by Frank Loesser in 1944.
Baby, It's Cold Outside