Unless you’ve been living under a rock somewhere you’ve probably heard the name Metro Boomin by now. The “New Atlanta” producer is on everybody’s list of hot producers to work with and in a short amount of time he’s already amassed quite an impressive resume. Crazy thing is, the producer is only 21-years-old! And to celebrate his 21st birthday, Metro has shared a music video of a new song featuring Rich Homie Quan. Check out “Too Short” after the jump.