Celtic Thunder features five male vocalists from Ireland and Scotland, ranging in age from 17 to 40. From rousing ensemble numbers to solos showcasing each members’ vocal style and personality, Celtic Thunder performs powerful ballads, popular hits, and heartwarming songs of love and loss from across the Celtic music spectrum—Irish, Scottish, traditional and contemporary. The group is backed by the Celtic Concert Orchestra. In December, Celtic Thunder completed their 2008 US tour of fifty cities to rave reviews, standing ovations and sell-out crowds.

Celtic Thunder made their U.S. television debut in March 2008 and audiences across the US have embraced them. Their breakout success made Celtic Thunder the 1 music program on the US public television network in 2008. The self-titled CD from the show debuted at 1 on the Billboard World Music chart in March 2008, and went on to dominate that chart until it was knocked off its perch by the second Celtic Thunder release, Act II, in September. This debut CD has spent a total of 44 weeks in the top 5 ranks on the Billboard World Music Chart, and was named World Music album of the year for 2008.