The Great British Baking Show host Noel Fielding always wears wild shirts, but outdid himself on the "Dairy Week" episode of season 10. At least as transmitted on video, the wavy lines seem to shift like a lenticular print. You can get a brief glimpse in this clip from the beginning of the episode (along with a Nine Inch Nails baking pun), and watch the full episode on Netflix:
Please comment below if you're able to track the shirt down online.
UPDATE: Thanks to FlowOfElectrons, here's the shirt.