50/50 Heroes S01E19 - After the Break

Animated comedy series. Mo thinks that he's going to become a star when Mr Brick chooses him to represent the school in his new advertising campaign, but Mo instead finds his face on a huge billboard with a line telling everybody that he is a very poor student. Angry, Mo wants to get rid of such publicity right now, so he summons the power to control advertising, but he realises that he is forced to advertise everything that he touches at half-power and ends up managing to close the school.