VIDEO: Josh Gad & James Corden Sing FROZEN Medley on 'Corden'!

On last night's LATE LATE SHOW, when guestJosh Gad is nowhere to be found during James Corden's nightly guest check-in, the actor shows up in the audience with a desire to host the show and sing a medley of songs from FROZEN.

Later, the actor talks about his experience starring in Broadway's BOOK OF MORMON, sharing, "I thought we'd be open for three months in which case I'd be shot for singing the things I was singing." Speaking on the success of Disney's Frozen, Gad reveals, "Nothing prepared me for what it became." And asked about the recently announced Frozen sequel, Gad coyly replied, "I know as much about it as you do!"

Check out the clips below!

James Corden takes the reigns as host of THE LATE LATE SHOW on CBS. The actor and singer comes to American late night television with a growing list of award-winning and critically acclaimed credits. He is a Tony Award-winning performer on Broadway, a BAFTA-winning star of a UK television series, a feature film actor with two releases this year, and an acclaimed host, writer and producer in several genres of television.

Corden starred opposite Meryl Streep, Johnny Depp and Emily Blunt in the Golden Globe Award-nominated feature film "Into the Woods," which hit theaters on Dec. 25, 2014. Additionally, Corden hosts the BAFTA Award-winning UK sports-themed comedy game show "A League of Their Own" on Sky 1 and stars in, produces and writes the BAFTA nominated comedy thriller "The Wrong Mans," which is available on Hulu and airs on the BBC. In 2013, Corden was awarded the Royal Television Society Award for Comedy Writer of the Year for his work on the show. Also, this year he will appear in the BBC television movie "Esio Trot," alongside Dustin Hoffman and Judi Dench.

Outside of his native England, Corden attracted international attention as the lead in the hit comedic play "One Man, Two Guvnors," performing first in the National Theatre and the West End in London and then on Broadway, which earned him the 2012 Tony Award for Best Leading Actor in a Play. His additional theater credits include the worldwide tour of "The History Boys" in the role of Timms, which he also played in the feature film adaptation.