Garth Brooks marked his 50th birthday on Tuesday with a celebration at the studio that he recorded all but one of his albums -- except the party wasn't for him. Brooks surprised producer Allen Reynolds by renaming the building Allentown Studios in his honor.

The Tennessean reports that Brooks, wife Trisha Yearwood, Steve Wariner, Kathy Mattea and a few other friends and family members were on hand for the celebration. “My wife said, ‘It’s your 50th. Dream as big as you want.’ And I couldn’t find anything in my heart that I wanted to do more than to see this guy get a little bit of what’s due," he said.

Brooks bought the studio from Reynolds two years ago to preserve it. Reynolds had purchased it from original owner Cowboy Jack Clement, who was also on hand to witness the name change from Jack's Tracks to Allentown Studios.

“We bought this building to protect it, so of course, we’re not going to tear it to the ground,” Brooks said. The only album not recorded inside the famed building was his 1999 'Chris Gaines' project.

“It feels great,” the retired Reynolds said. “It feels better to see all of the people that were here today. It’ll be a hard habit for me to break to stop calling it ‘Jack’s Tracks.’”

The producer thought he was going to the studio to help celebrate Brooks' 50th birthday. He got quite a surprise when the singer unveiled an engraved 'Allentown Studios' sign.