Based on the search results, Phillies fans are singing two different songs. One is "Dancing On My Own" by Calum Scott, which has become an anthem for the team and is played in the locker room after every win. The other song is "AOK" by Tai Verdes, which is the walk-up song for Phillies player Bryson Stott and has developed a cult following among the Philadelphia fanbase. Fans have been singing along to "AOK" during Stotts at-bats, and the sing-alongs appear to be getting louder and louder as the team continues its playoff run.