Roots Picnic. This year's picnic will be headlined by Snoop Doggy Dogg aka Snoop Lion backed by The Legendary Roots Crew. The DJ Set will be handled by none other than the The Diabolical Biz Markie. The event will take place at The Festival Pier at Penn's Landing, Philadelphia. If you haven't, mark your calender for May 31st. For more info and tickets, click the banner above or (here).