On Sunday, Reneé Rapp invited Kesha onstage during her set at Coachella. The duo performed Kesha’s ‘Tik Tok’ and dissed Sean ‘Diddy’ Combs by changing some famous lyrics. The singer, who emerged roughly halfway through Rapp’s performance, performed her 2010 hit song ‘TikTok’ and altered the first line, “Wake up in the morning like fuck P. Diddy,” raising her middle finger in the air with Rapp. Kesha carried on with the rest of the song, but it seemed like this was her first chance to perform her hit song on a stage this size, and she made it quite evident how she felt about Diddy and the contr…