VIDEO: Nick Jonas & Demi Lovato Talk Touring Together & Lovato Takes the 30-Second 'Star Spangle Banner' Test

On last night's LATE SHOW, guest Demi Lovato revealed she had the hots for 'Barney' when she appeared on the children's TV show. Later, Lovato and her touring mate Nick Jonas shared that they are often too busy to shower on tour, so they do it during photo shoots. And can Demi Lovato and Stephen Colbert sing the national anthem in 30 seconds or less? Watch the clips below!

THE LATE SHOW WITH STEPHEN COLBERT premiered on Tuesday, Sept. 8 on CBS.The show is broadcast from the historic Ed Sullivan Theater in New York City.

A multi-talented and respected host, writer, producer, satirist and comedian, Colbert is well-known for his previous late night show, "The Colbert Report," which concluded on Friday, Dec. 18, 2014. The program received wide-spread critical acclaim and earned two Peabody Awards and 29 Emmy Award nominations, including two Emmy wins for Outstanding Variety Series (2013, 2014) and four Emmy wins for Outstanding Writing for a Variety, Music or Comedy Program (2008, 2010, 2013, 2014). Prior to that, Colbert spent eight years as a correspondent on Comedy Central's "The Daily Show" as an on-air personality and writer of news satire for the Emmy and Peabody Award-winning series.