With the combined success of The Sing-Off and Pitch Perfect's "Cups" from Anna Kendrick becoming an unlikely radio hit, a cappella has officially hit the mainstream. And with groups racing up the Billboard charts, touring the country and linking up with superstars, the fever shows no signs of subsiding. 

As Fuse News researched earlier this year, the scene is experiencing a massive surge in "a cappopularity," mainly thanks to groups uploading and sharing on YouTube. While there's certainly a whole lot to sift through, we've selected seven acts to check out right now. 

Get lost in a cappalooza of a cappella now!