Doc McStuffins (2012)

S3E26 Lambie Gets the Linties

Professor Hootsburg is excited to create a portrait of the "plushies," but during a pirouette, Lambie accidentally tumbles into a mud puddle, leaving her too dirty to join in. Meanwhile, the Wicked King attempts to sneak into the shot and ruin the painting. When Lambie finally returns, she’s shocked to find herself covered in lint, requiring surgery to get rid of it from her plush body.