Big Sean has been hitting Twitter heavy lately with teasers about a big announcement, and it finally came via his website.

Big Sean will drop his 'Detroit' mixtape on September 5th, which lines up a fall full of Big Sean.

Sean will release 'Detroit' then be featured on the G.O.O.D. Music 'Cruel Summer' compilation later in the month.  He has also promised fans that he will drop a new album before the end of 2012.

On top of that, Sean announced his Canadian 'Finally Famous' tour dates with a special message for our neighbors to the north.

Big Sean 'Detroit' Mixtape