Taylor Swift‘s surprise ... when Swift sat at her piano and told the crowd, "I've never performed this one live before," and then went straight into "How Did It End?" from Tortured Poets.

Taylor Swift joked ... on the piano top and it closed. She went back into the "Reputation" track and Swifties in the audience loved it. After the first chorus, she asked, "Did I choose correctly?" ...

Has anyone tried putting Taylor Swift's piano in a bowl of rice ... surprising the "Lavender Haze" performer. "Did you hear that? Do you hear the piano? Are they able to hear that?