Spears used pyrotechnic effects and explosions while performing “Oops…I Did It Again”‘ and “(You Drive Me) Crazy.” Arena power and lighting worked after the failure, but Spears’ stage shows require additional power. A member of Spears’ management appeared on stage with the entertainer and told the crowd the concert was canceled because of safety concerns.

“I’m just so sorry,” Spears told the crowd at a Texas Tech arena, before being met with boos. “Please don’t boo,” she said, then walked off the stage.

Spears’ U.S. tour began May 24 in Las Vegas and ends July 22 in Dallas.