I just discovered Voctave and wanted to post a couple of their songs: Mary Did You Know (with Mark Lowry); and O Holy Night. Their harmonies are angelic. Hope you enjoy!
O Holy Night:
I was searching for Christian music by the following a cappella group, Pentatonix, when I discovered Voctave. I wanted to include one of their songs from their Christmas album, Mary Did You Know:
Some Voctave songs I downloaded that were not relevant to this post are The Star Spangled Banner; Somewhere over the Rainbow and Zip-A-Dee-Doo-Dah. Both groups have a lot of samples on YouTube.