For Celtic Thunder, Sharon Browne has teamed up with Grammy-nominated Irish songwriting and composing veteran Phil Coulter to produce a show that includes an eclectic mix of songs ranging from the traditional "Mountains of Mourne" and "Come By the Hills" to international hits such as "Brothers in Arms" and "Desperado," as well as original compositions by Coulter, who has written hits for Elvis Presley ("My Boy") and the Bay City Rollers, and performed with Van Morrison, Tom Jones, and the Rolling Stones. The ensemble numbers in Celtic Thunder reflect the power of the vocalists, who range in age from 14 to 40, and feature songs that celebrate a common Celtic heritage.