Olivia Rodrigo hosts GUTS Gallery Pop-Up experience in London presented by American Express during her four sold-out nights at The O2 Arena in London. The elevated shopping opportunity will will have GUTS merch available for purchase, including exclusive t-shirts, hoodies, and sweatshirts, as well as fun accessories like bumper stickers, dad hats, beanies, tote bags, and more. Fans attending the pop-up will receive complimentary tote bag with purchase and can take advantage…