Corden -- a self-proclaimed boy band fan -- also asked Moore to share the "embarrassing" story
of when she toured with 'NSYNC and Backstreet Boys at age 15. "I remember distinctly one time walking backstage, and I didn't really see much of the guys because I was the measly opening act," she recalled. "Nobody cared about me ...and somehow there was a conversation about feet or foot size. They were comparing shoe size. And all the background dancers and 'NSYNC background dancers and my background dancers, and I stroll up at 15 like freaking out that Justin Timberlake is there."