Lady Gaga played to a sold-out crowd Monday night. | Photo by Sara Havens

Monday evening — which she re-termed “party night” in Louisville — Lady Gaga brought the sold-out crowd that packed into the KFC Yum! Center to its feet for more than two hours of nonstop singing, dancing and chatting.

Of course, there were costume changes — it’s Lady Gaga, after all — but those were quick and hardly noticeable.

Gaga mentioned she hadn’t been in “Lou-vull” since 2011 and demanded that every last person in the venue stand up and join the camaraderie of her Joanne World Tour — where everyone is free to be who they are. This got all the little monsters who surrounded the ground-floor stages riled up, and the energy never stopped until the lights came on a little after 11 p.m.

Of course there were many costume changes. | Photo by Katie Gausepohl

While Lady Gaga canceled the European leg of the tour this fall for physical health reasons, she seemed in perfect shape as she danced, gyrated and climbed on top of her backup dancers.

In her recent Netflix documentary, “Five Foot Two,” the artist opened up about her struggles with fibromyalgia, and she told the Louisville audience Monday night about her family history with the chronic pain disease. Her Aunt Joanne — whom she named the album and song for — died of lupus long before Lady Gaga was born.

Although most of the songs she performed were from the 2016 “Joanne” album, she did intersperse them with hits from her previous three albums, including “Poker Face,” “Bad Romance,” “Paparazzi” and, of course, “Born This Way.”

While the elaborate choreography and high-energy numbers were thrilling, it was when she sat down at the piano —  just her, the instrument and the spotlight — that was most touching. She sang “Come to Mama” and “The Edge of Glory” while playing the piano, and the laser lights that beamed from the ceiling appeared to be connected with to chords. It was like watching the inner workings of a piano through lasers.

She ended the evening with an encore of “Million Reasons” and thanked Kentucky once again for showing up and supporting her and her art.

Here’s a few more images from the show, courtesy of friends with better seats: