Sneak Peek: Meet PEOPLE's Ones to Watch 2014

Get a first look at some of the 40 up-and-coming stars we're celebrating this year – before they hit it really big

RIXTON

The British YouTube sensations turned chart toppers aren't a "boy band" per se, but that hasn't prevented pandemonium. "In New York fans broke into our hotel and police had to shut down the street," says Lewi Morgan, 26 (in suspenders, with, from left, Charley Bagnall, 28, Jake Roche, 22, and Danny Wilkin, 24). "It was pretty crazy!"