On the first line of her first single, the massive 2009 hit “Tik Tok,” Kesha sang-rapped about waking up in the morning feeling like P. Diddy. Naturally, given recent events, nobody wants to sing-rap about feeling like P. Diddy anymore. So whenever Kesha performs “Tik Tok” now, including in a surprise Coachella appearance with a rising young star, she’s got to readjust that lyric.