Gracie Abrams was cured of stage fright after performing on Taylor Swift’s ‘Eras’ tour. The 24-year-old singer was one of the opening acts for the ‘Cruel Summer’ hitmaker’s first US leg of her concert series and she admitted performing for her friend’s crowds every night helped to “rewire a huge chunk of [her] brain” and eased her debilitating fear. She told Who What Wear: “I avoided [performing] at all costs. “That rewired a huge chunk of my brain—not just in terms of performing and stage fright and that kind of s*** but in my life. “I told myself that I knew I would hate performing. I knew I…