ICYMI: Keith Urban is joining NBC’s The Voice as this season’s “Mega Mentor,” beginning April 8. He will mentor the remaining artists who have made it through the battle rounds as they prep for the knockouts. Urban has history with the show, having been a coach on three seasons of The Voice in Australia, and an advisor to then coach Blake Shelton on season 15 of the U.S. version, in addition to several years as an American Idol judge.