Big Sean attends the Roc Nation's pre-Grammy brunch in NY rocking a Vivienne Westwood mafia coat (Details, pics)

American rap star, Big Sean attends the Roc Nation's pre-Grammy brunch hosted by the Hip Hop music mogul, Jay Z in New York City rocking a Vivienne Westwood mafia coat.

The 60th annual Grammy awards ceremony is scheduled to host later today.