LOUISVILLE, Ky. (WDRB) -- One of the most popular rock bands of all time invaded Louisville on Friday night.

Tens of thousands of fans were on hand to see U2 perform at Papa John's Cardinal Stadium. Many arrived early to enjoy the sun and to tailgate.

"We decided to get here a little early," Kathy Ralston said. "I really didn't know where the crowd would be or the parking, and so we came out here and got some barbecue, and we have some other friends coming down, and we are all 40-plus and ready to see some good music."

U2 is celebrating the 30th anniversary of its Joshua Tree album.

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