It's not every day you hear your own song on the radio, design a t-shirt or get to pose on the cover of a magazine. So when this happens, it's not a surprise if you decide to celebrate and that's exactly what your fave celebs do. These stars don't even care that they're already famous, they still have the same reaction every time they run into something they're worked on and they have every right to be proud!
Click through the gallery to see all the times celebs have totally been their own biggest cheerleaders. Then tell us in the comments what you think about all of these fun moments!
Jake Miller knows his face is quite handsome, so he wears his own merch.