“Adele was absolutely gutted, Beyonce is one of her big heroes. It would have been the stuff of dreams to perform with her - the gig of her life. But docs have told her she's got to rest her voice or risk damaging her prized asset. She hopes one day they can do something together," The Sun quoted a source as saying. Adele also wrote on her website, "There is nothing I can do but listen to the advice and rest."
Meanwhile, Beyonce and husband Jay-Z enjoyed Coldplay's gig along with their friend Gwyneth Paltrow. Beyonce also reportedly roamed around by disguising herself with a mask!