Having been declared world record holders, the massed pipers played “Happy Birthday” on request, followed by an impromptu “Amazing Grace” to a cheering crowd, many using their phones to record the moment.

The Australian Book of Records, which has been certifying records since 2012, confirmed that 374 pipers had together broken a record set by 333 pipers in Bulgaria in 2012. The U.K.’s better known Guinness World Records, which confirmed the Bulgarian record, told The Associated Press that it hadn’t been approached to assess the Melbourne record attempt.

Many of the enthusiastic spectators wore AC/DC T-shirts. Asked from the stage who among them were going to the concert afterward, many hands went up.

One AC/DC fan who did not see the record set was Keegan Kohler, 23, a self-employed electrician from Columbus, Ohio. He had been waiting outside the concert stadium since 4:50 a.m. to ensure he’d be first in when the gates opened at 5 p.m. The bagpipes record was set nearby at 5:15 p.m.

Kohler had seen AC/DC perform their “Power Up Tour” this year in Cleveland, Washington, D.C., Detroit and Pittsburgh, but expected the experience to be better in the band’s home country. He was seeing two shows in Melbourne and one in the band’s hometown of Sydney.

“I think Aussie crowds are going to be way better than the U.S.,” he said. “I think it’s going to be more eventful, more head banging, more excitement with the crowds.”

Kohler also reacquainted himself outside the stadium with Stephen Scott, from Charlotte, North Carolina. The pair first met in a line outside an AC/DC concert in Detroit.

Scott, a 33-year-old real estate agent, has seen the current tour multiple times in Europe as well as the United States and wanted to see the band perform in Australia.

“I’ve always talked about wanting to see them here. This is the first opportunity really to do it and maybe the last,” Scott said.

His fiancée, Amber Thompson, a 31-year-old artist, said it was Scott’s idea to travel 10,000 miles for the concert.

“I enjoy it, but I probably wouldn’t be here if I didn’t know him,” she said, referring to Scott, whom she described as the true fan.