What was the deal? The horns weren't Perry's idea. The horns went along with the AC/DC performance of "Highway to Hell" which opened the show. Look closely and the horns say AC/DC on them.

Michael DeMocker / The Times-PicayuneAC/DC lead guitarist Angus Young flashes his signature devil horns at the New Orleans Arena.

Concertgoers sported “Tacoma or Bust” T-shirts and ubiquitous, blinking red devil horns (an AC/DC tradition), lending an eerie glow to the auditorium. Fans spanned multiple generations.

The AC/DC Devil Horn Backpack is priced at $61.99 for pre-order on the Merchoid Store, which accepts international orders. See more AC/DC toys and other amazing rock backpacks here on the Toy Blog.

AC/DC broke a seven-year hiatus last night at the Power Trip festival, while Judas Priest welcomed an ailing member during its encore.

AC/DC die-hard fans, who are happy to pay 100 euros for an AC/DC soccer kit or 20 euros for flashing devil horns for their favorites, know how to appreciate this.

AC/DC broke a seven-year hiatus last night at the Power Trip festival, while Judas Priest welcomed an ailing member during its encore.