A look back at Celtic Thunder lead George Donaldson's gift of music - VIDEO

Celtic Thunder's lead singer George Donaldson, who died of a heart attack this week, brought unparalleled simplicity & soulfulness. Here are some of his best performances.

Fans all around the world have been devastated by the news that George Donaldson, the lead singer of Celtic Thunder, died on Wednesday after suffering a massive heart attack at his home in Glasgow, Scotland.

Only 46-years-old, he leaves behind his wife, Carolyn, and 13-year-old daughter, Sarah.

Donaldson, often seen as the father-figure of the group, brought simplicity and soulfulness to each of his performances - both with Celtic Thunder, which he joined in 2007, and in his blossoming solo career. Donaldson won the Irish Music Awards in 2011 and 2012. His most recent album, "The World in my Mind," was released just last year.

Here's a look back at some of his most moving and memorable songs:

George Donaldson sings "The Parting Glass" in Jinty McGuinty's, his favorite bar in his hometown of Glasgow:


Singing "Cats in the Cradle" during one of the Celtic Thunder Cruises:


The video for "Glasgow," his original song dedicated to his hometown:


"The Old Man," one of his earliest numbers with Celtic Thunder:


One of his crowd-thrilling performances from Celtic Thunder's most recent Mythology tour:


All of the Celtic Thunder lads sing "Amazing Grace" together: