1. Roots Picnic / June 5, 2010 / Philadelphia (Festival Pier at Penn's Landing)

    June 07, 2010 1:30 PM EDT In only its third year, the Roots Picnic has established itself as Philadelphia's premiere outdoor summer festival thanks to a mix-and-match collection of bands and relaxed atmosphere. Although a few aggravating scheduling problems threatened the easygoing vibe, Saturday's show at…