U2 topped the bill Friday night as a who's who of Irish artists raised money to help Christy Dignam -- vocalist for the long-running Irish band, Aslan -- pay medical bills as he fights cancer.
U2 did a cover of Aslan's "This Is," which you can see below.
The event took place in Dublin's Olympia Theatre, but U2's performance happened at Electric Lady Studios in New York City. A close look at the video gives the impression that it was pre-recorded. (See the 3:58 mark where Edge is at his mic singing, but the next moment he's away from the mic looking down.)