Guest Host Mark Rober has been a guest on our show and now a guest host, but never the music guest, so using the power of engineering and some help from Demi Lovato he created a machine to help that dream become a reality. Demi's new album Holy FVC* comes out August 19th and they're touring for the first time in four years this fall. Watch Jimmy Kimmel Live! WEEKNIGHTS 11:35/10:35c on ABC. Stream on Hulu.