During a live performance at the Glastonbury Festival in England on Saturday night, singer Adele cursed a total of 33 times during her 90 minute set, which was being broadcast live by the BBC. Several twitter users used the social media platform to voice their unhappy concert reviews. Richard Tominlinson tweeted: “Great set by @Adele but did she have to swear so much?” Twitter user Mirjam van Erkelens wrote, We’re still on ‘Hello’ and she’s already spent her fee on the swear box.” The Grammy-winning singer is well aware of her tendency to use curse words, it seems, as she joked about it on stage. “Do you know how rock ‘n’ roll I am? Not very, but the BBC had to give me a warning about my potty mouth before I went on. I bet Muse didn’t get that,” she said.