Philadelphia’s annual Jam on the River has confirmed its 2007 lineup. The two-day event will take place May 26 and 27 at the citys Great Plaza at Penn’s Landing. On Saturday the 26th, the Jam will boast performance by the Disco Biscuits, Common, Bustle in Your Hedgerow, and Grimace Federation. On Sunday the 27th it will be STS9, the John Butler Trio, the Wailers, Dark Star Orchestra, and The Brakes. After the festival’s first day of Great Plaza festivities, STS9 and Conspirator will perform at Philadelphia’s Electric Factory, while the Disco Biscuits and Grimace Federation will fill the room on May 27. Tickets go on sale Saturday, April 14th.