For almost 25 years, GREGORIAN have thrilled millions of people worldwide with their choreographed shows and their ability to switch seamlessly from classical chorales to pop and rock songs. Featuring Amelia Brightman, Dan Hoadley, and Tristan Stocks, their concerts have set new standards. With over 2,000 shows in 35 countries and more than 10 million albums sold, GREGORIAN are the most successful choir in the world....