Gracie Abrams bought a budget acupressure mat on the recommendation of Taylor Swift. The ‘Us’ singer – who was one of the opening acts for the ‘Cruel Summer’ hitmaker’s first US leg of her ‘Eras Tour’ concert series – suffers from back pain when she’s on the road for a period of time, but it has been eased thanks to a tip from her popstar pal. In a social media interview for Who What Wear, Gracie said: “There’s this amazing acupressure mat that I think is like $15 on Amazon. “It’s so painful, but it helps with back pain, and if you’re touring you must have back pain. Taylor gave me that advice…