Four guys from Michigan, the band TWENTYFORSEVEN, take on some of the biggest artists of 2012, including Justin Bieber and PSY, in their live performance mash-up of this year’s biggest hits. Watch them weave  ”Glad You Came,” “We Are Never Ever Getting Back Together,” “Call Me Maybe,” “Wide Awake,” “Boyfriend,” “Payphone,” “Somebody That I Used To Know” and more of the songs that defined our year into one mega-hit track.

Their take also includes what is perhaps the best, least intrusive insertion of “Gangnam Style” into a video so far this year.

The guys of TWENTYFORSEVEN recently released their single “All I Ever Wanted” as a lyric video with a full music video expected to follow soon.

The guys spent much of their time this year perfecting their take on the hits — including their version of One Direction’s “One Thing” and “What Makes You Beautiful.”

-Courtney E. Smith, CBS Local