After a weeklong start-and-stop that at one point involved Dr. Luke’s label yanking Kesha’s performance from the Billboard Music Awards, only to change their minds days later, Kesha finally got to perform at Sunday’s BBMAs. As planned, she belted Bob Dylan’s “It Ain’t Me, Babe†with Ben Folds to a stunned, hushed crowd that gave her the night’s first standing ovation. Have a tissue at the ready.