Mac Miller reached 300k followers on Twitter and decided to spit a little something for his fans. He's started a new campaign called "Road 2 A Million Fans", so we don't expect him to slow down anytime soon. For this one, he borrows the beat from People Under The Stairs' underground classic "San Francisco Knights".

Just wanted to spit a lil somethin for all 300k of y'all! #road2amillionfansless than a minute ago via Twitter for iPad Favorite Retweet Reply

Listen: Mac Miller "People Under The Stairs"