We're used to seeing celebs looking their best, whether they're walking the red carpet, performing on stage or starring on a TV show. We always see them looking so glamorous, but there have been moments when they were caught showing off their nerdy side in the cutest ways.
Harry Styles, Ariana Grande and Taylor Swift are just some superstars who have totally transformed right before our very eyes and underwent geeky makeovers. They might look super different, but it's always cool to see celebs unafraid to try out some fun new looks.
Click through the gallery to witness your fave celebs turn into the most adorable nerds. Then tell us in the comments whose makeover you think is the best!