Blake Shelton On Marrying Gwen, His Weight Loss Goals, And Why They Hid Their Love From Adam Levine

EXTENDED INTERVIEW - "The Voice" coach and country music superstar Blake Shelton opens up about his engagement to Gwen Sefani, the reason they hid their love from Adam Levine for so long, and the pounds he promised Luke Byran he'd lose before the wedding. Subscribe To "The Late Show" Channel HERE: http://bit.ly/ColbertYouTube For more content from "The Late Show with Stephen Colbert", click HERE: http://bit.ly/1AKISnR Watch full episodes of "The Late Show" HERE: http://bit.ly/1Puei40 Like "The Late Show" on Facebook HERE: http://on.fb.me/1df139Y Follow "The Late Show" on Twitter HERE: http://bit.ly/1dMzZzG Follow "The Late Show" on Google+ HERE: http://bit.ly/1JlGgzw Follow "The Late Show" on Instagram HERE: http://bit.ly/29wfREj Follow "The Late Show" on Tumblr HERE: http://bit.ly/29DVvtR Watch The Late Show with Stephen Colbert weeknights at 11:35 PM ET/10:35 PM CT. Only on CBS. Get the CBS app for iPhone & iPad! Click HERE: Get new episodes of shows you love across devices the next day, stream live TV, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B --- The Late Show with Stephen Colbert is the premier late night talk show on CBS, airing at 11:35pm EST, streaming online via CBS All Access, and delivered to the International Space Station on a USB drive taped to a weather balloon. Every night, viewers can expect: Comedy, humor, funny moments, witty interviews, celebrities, famous people, movie stars, bits, humorous celebrities doing bits, funny celebs, big group photos of every star from Hollywood, even the reclusive ones, plus also jokes.