Das Racist @ The Mad Decent Block Party.

The Piazza at Schmidt’s was packed again for the second Sunday in a row, this time because of the the fourth annual Mad Decent Block Party.

Diplo, as usual, was the main draw but this year’s line-up also featured Das Racist, the Brooklyn-based good time rappers.

Das Racist’s album Relax is set to drop on September 13.

The group recently announced their fall tour – and while they’ll be hitting Boston, Providence and Washington D.C., they won’t be swinging through Philly. Bummer.

Diplo watched the show from backstage, apparently checking his BlackBerry.

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The fall issue of JUMP will hit the streets on September 6.