Ariana Grande brought out her Wicked co-star Cynthia Erivo to sing a song from the film during her show in London on Sunday (Aug 26). The 33-year-old pop singer has taken her Eternal Sunshine tour to the UK capital and she gave fans at the O2 Arena a treat during her second gig at the venue when she introduced Erivo to the stage for a performance of Wicked track For Good. A source told The Sun newspaper: "The crowd absolutely lost their minds when Cynthia came on stage for the Wicked reunion. "Cynthia and Ariana couldn't stop beaming as they were reunited to sing For Good. It was almost the end of the concert and everyone was shocked." The…
