Ireland's Celtic Tenors are a popular classical crossover trio who perform a mix of classical music, opera, traditional Celtic songs, folk, and pop. Although the Celtic Tenors officially formed in 2000 when they signed to EMI, the group has its origins in a vocal ensemble called the Three Irish Tenors, who performed on RTE's (Radio and Television of Ireland) Theatre Nights program in the mid-'90s. In 2000, the renamed Celtic Tenors, featuring original members Niall Morris and James Nelson along with Matthew Gilsenan (who took over for Three Irish Tenors member Paul Hennessy), ...