Totally awesome! Identical Quintuplet aca group sing the Lava song from Pixar short.
From Wikipedia: Peter Hollens (born March 4, 1982) is an American singer/songwriter, producer and entrepreneur. He has been involved with a cappella music since 1999 when he and Leo da Silva founded the University of Oregon’s a cappella group, On The Rocks, known as the first official collegiate a cappella group in Oregon. He regularly releases new music videos to his YouTube channel.