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. ♪ will you take me will you take me ♪ >> i love acapella. way you work go diggety. now, a big-time competition in new york this coming weekend puts singers center stage. it's the international championship of collegiate acapella will crown its 2015 champion. ben tracy has been following one of the teams and shows us how this musical form is following a very high note. >> reporter: before the film "pitch perfect" hit movie theaters. >> organized nerd singing. >> reporter: acapella had a bit of an image problem. >> it's pretty lame. >> excuse me? >> reporter: the success of that 2012 comedy as well as tv hits "glee" and "the sing-off," have made making music with your mouth mainstream. one of the top-selling albums of 2014 belongs to the group, a quintet with almost 8 million youtube followers and a grammy win. miles nuzzy is the president of the socal vocals a co-ed acapella frup at the university of california. nicky segal is one of its soloists. >> not to be mean but i imagine at one time in your life this wasn't the coolest thing to do. >>

the icca championships are sometimes referred tos at super bowl of acapella.itive world of kbej acapella singing. and this is the real life pitch perfect. ♪ this is going to be the best day of my life ♪ ♪ my life ♪ >> the international championship of collegiate acapella, better known as the icca, held their final saturday night in new york city bringing some of the best college acapella singers together under one roof. >> the icca tournament is the march madness of acapella. >> this is as big as it gets. >> everything is at stake. >> it's like the super bowl of acapella. it really is. ♪ we both know ♪ ♪ rollin' on the river ♪ >> acapella is in. >> it's caught on slowly over time. "american idol" came out, singing is cool. then they had the singoff on tv. and "pitch perfect" really put us on the map. >> dl is even a new acapella reality show called "sing it on." >> we want an obvious spot in our group. >> yay! >> one of the teams featured in the show, the nor'easter of northeastern university competed in the icca finals. ♪ nobody ♪ >> but it was the vocals of