When we had Carter and Knight in the studio talking about their latest project, we asked them to take a walk down memory lane and explain to us some of their fashion looks over the years. From shirtless overalls to tons of khaki, here's what the guys had to say when discussing their fashion evolution.

"I never, ever have thought that I actually was very good at style and dressing myself," Carter admits when he's given some photos of his earliest looks. "Now more than ever I let my wife help me out a lot. Some things like this, I have no idea what that is. I look like the guy from Puddle of Mudd."

He's talking about an outfit he wore to the Festivalbar Music Festival in Turin, Italy back in 2005. During his performance, the Backstreet Boy showed his dark side with a skull woven onto his button-down dress shirt.

Carter once again questions an outfit he wore to the 2004 MTV Movie Awards. During his walk on the red carpet, the Backstreet Boy showed off some skin in his ripped bell bottom jeans. He also sported a khaki button-down shirt. "I don't know why I'm wearing bell bottoms, to be quite honest."

"We could have been Nick & Knight in the early 2000s," Knight quips when he finds himself sporting a khaki shirt back in 2001 during MTV's 20th Anniversary at Hammerstein Ballroom in New York.

So what was Knight's signature look in the '90s? Well, he had a few. Turtlenecks, leather and overalls.

"The turtleneck, everybody wore turtlenecks," he admits. "I could have jumped in Backstreet here. Woah! Beeper."

He is of course referring to a beeper clipped on an all-leather ensemble he wore back in 1999, when he showed up at a Virgin Megastore in California to promote his debut solo album Jordan Knight.