Hi Cat,
Always nice to hear from you Cat. This is an actual group called "Gregorian" So far what i have been searching, they started in 1999. They are indeed called masters of chant, but they sing regular songs. Here is one website i have found.

www.gregorian-music.com

Click onto albums and it will show you all of their cd's, most of them you can hear a song for 30 seconds. I just love how they sound. Still waiting to get 2 cd's in the mail. They even have a Christmas CD from last year. I am really excited about finding this group and can't wait to get their cd's and a dvd. My two cents worth. Thanks for your reply Cat.
Nash