Are you ready for the ultimate test, M Girls? We know you know tons of trivia about your favorite celebs — Selena Gomez's favorite color, Niall Horan's favorite snack, and lots of other fun facts. But how well do you REALLY know your favorite stars? Can you match them to their real-life bedrooms?
M rounded up photos of actual celebs' bedrooms and now we want to know: Can you guess which star each room belongs to? Give it your best shot by clicking through the gallery below. Make your guess then click the arrow to reveal the answer on the next slide!
When you've clicked all the way through, tell us in the comments: How many did you get right?