Before he fully committed, the 35-year-old singer turned to another former boy bander, *NSYNC's Joey Fatone, to get the inside scoop on the series.
"Joey was one of the inspirations because I spoke to him about it and I'm like, 'You know I'm really pondering and considering this idea of doing Dancing With the Stars. What do you think?' And he's like, 'You need to do it.' He said, 'I loved it. It was a great experience,'" he revealed.
Carter's former musical rival even showed him some moves to get him ready for the big mirror ball competition. "We would go through like some dance moves. A little bit of the cha-cha," he said. "[Joey] is a great dancer as well, so it really encouraged me to have him support me as well."
Many fans are saying that Carter already has an unfair advantage in the competition due to his years of dancing on tour and in music videos, however, the star was quick to challenge those assumptions.
"Obviously, I've danced my whole life, but ballroom dancing is a different thing. I feel like it could teach me something," he admitted. "To be quite honest, I've never held myself at a high standard as far as dancing goes. I've always been in an ensemble with the guys dancing as a troop, so to speak. As a solo dancer out by myself, I'm a little insecure about it."
Carter's schedule is about to get insanely hectic as he juggles his DWTS rehearsals with filming for Dead 7, a Western zombie movie starring members of both Backstreet Boys and *NSYNC.
"We're really going to have to do a lot of rehearsals in between takes on set," Carter said of his professional partner Sharna Burgess. "I've had a couple of rehearsals that we've done back when I was in L.A., but not enough."
Carter continued, "It's going to be like crash course. I'm going to rely a little bit on my experience as a dancer, but it's still something that I'm going to have to put the work in. I know that… I come from a very hip-hop, sort of jazz background as far as dancing goes, so it's going to be really interesting to see how I look doing this stuff."
Take a look at our full interview with Carter above to see a preview of his DWTS moves and don’t miss the season 21 premiere of Dancing With the Stars on Monday, Sept. 14 at 8 p.m. ET/PT on ABC.