"I get very emotional when people bring it up," the country star said on TODAY.
The singer-actor is opening several dates of Dua Lipa's Radical Optimism Tour.
The former MTV host and DJ is recovering from a massive stroke he suffered in January.
"The music community does amazing things when it comes together,” Harvey Mason jr. said.
Glock dropped off his new album Glockaveli on Friday.
The original all-star famine relief shows were held on July 13, 1985 in London an Philadelphia and raised more than $125 million.
The gigs at Portman Road will have the singer performing at the home of his beloved Ipswich Town FC team.
Elevation Rhythm, CeCe Winans and For King & Country are also among the Contemporary Christian Music artists up for awards at the May 25 show.
The upcoming all-star "Back to the Beginning" show has also added members of Soundgarden and Aerosmith singer Steven Tyler to the roster.
The new track, co-produced by Dan Nigro is the lead single from her upcoming fourth studio album.
