5.) Hot Chelle Rae
(Photo by Stephen Lovekin/Getty Images)
Hot Chelle Rae have been playing since 2005, but this was the banner year for the Nashville pop-rockers. Their smash hit single "Tonight, Tonight" put them on the national landscape of modern pop greats, and they followed with "I Like it Like That," just a few months later, giving the Pop world a one-two punch that could not be denied!