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".

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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

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Listen: Mac Miller "People Under The Stairs"