Sebastian Arcelus - World's Greatest Dad - Sirius XM Live on Broadway! 12- 1 - 2010: Sebastian Arcelus performs "World's Greatest Dad" from Elf the Musical with a score by Matthew Sklar and Chad Beguelin at the taping of SIRIUS XM LIVE ON BROADWAY! Hosted by Seth Rudetsky, SIRIUS XM LIVE ON BROADWAY is recorded live every Wednesday at 12:00 PM ET (noon) at the Broadway Concierge & Ticket Cente…
SOURCE: YouTube at 03:26PM on January 6, 2011