LONDON — Taylor Swift's pink dress shined bright in the Wembley Stadium arena on Monday as the audience wristbands illuminated bright blue ... plays songs on the guitar and the piano.

Taylor Swift invited her ... the eras entertainer twirled in her purple-blue dress and strutted up to the microphone.

After featuring her koi fish guitar from her Speak Now era in her "Anti-Hero" music video, Swift makes ... think her black and blue nail polish could represent Reputation (Taylor's Version ...