Nick Jonas made his debut on The Voice as a guest mentor for Christina Aguilera in the eighth season and now the 27 years old singer has returned to The Voice as the fourth coach for its eighteenth season. Nick Jonas replaced Gwen Stefani on the show, who moved to Las Vegas. The premiere episode of The Voice aired on Monday and Nick marked his entry unzipping his jumpsuit to reveal a tuxedo. He further ripped the tuxedo and set the female fans cheering for him.