'We apologize': Live Nation on Taylor Swift fiasco

STORY: "We were then hit with three times the amount of bot traffic that we'd ever experienced and for the first time in 400 verified fan on sales that came after our verified fair on pass password servers as well," said Berchtold.

"While the bots failed to penetrate our systems or require any tickets, the attack requires us to slow down and even pause our sales."

Live Nation Entertainment Inc subsidiary Ticketmaster, which has been unpopular with fans for years, has drawn fresh heat from U.S. lawmakers over how it handled ticket sales last fall for Swift's "Eras" tour, her first in five years.