Commission for anonymous.
During a sleepover at Peach's castle, Princess Rosalina is playing the classic "forehead coin to funnel" prank on Peach while the playful Luma laugh and Toad watches in horror.
For those who aren't familiar with the prank, I'll quote Wikipedia: "You place a funnel in your pants and a coin on your forehead. You show the victim how it's done by allowing the coin to fall into the funnel. When they try it, you pour liquid down the funnel."
Poor Peach, who knew that Rosalina was fond of practical jokes?
Characters © Nintendo