Broken Social Scene, the Walkmen, the Von Bondies, Bumblebeez 81, Danger Mouse and the Datsuns have been added to this summer's Lollapalooza festival, Billboard.com has learned. The tour will kick off July 14 outside Seattle and will feature its first two-day lineup.

One night's lineup will sport the above bands as well as Morrissey, Sonic Youth, Le Tigre, PJ Harvey, Modest Mouse and Black Rebel Motorcycle Club. The second night includes String Cheese Incident, Gomez, Flaming Lips, the Thrills, the Polyphonic Spree, the Coup, Sound Tribe Sector 9, Elbow, Wheat and Dresden Dolls. DJ Peretz (tour co-founder Perry Farrell) will perform with both bills.

Not all acts will play all shows and additional bands are expected to be added.

The tour will head to Mountain View, Calif., after the opening two-night stint outside Seattle. Tickets for a July 17-18 stand at Shoreline Amphitheatre go on sale Sunday (May 2) via Ticketmaster. Reserved seats will sell for $49.50, with lawn tickets priced at $29.50. Fans can purchase two-day lawn tickets for $50.

Here are confirmed Lollapalooza tour dates:

July 14-15: Auburn, Wash. (White River Amphitheatre)
July 17-18: Mountain View, Calif. (Shoreline Amphitheatre)
July 26-27: Denver (Coors Amphitheatre)
July 29-30: Tinley Park, Ill. (Tweeter Center)
Aug. 2-3: Clarkston, Mich. (DTE Energy Music Theatre)
Aug. 5-6: Toronto (Molson Amphitheatre)
Aug. 9-10: Cuyahoga Falls, Ohio (Blossom Music Center)
Aug. 12-13: Columbia, Md. (Merriweather Post Pavilion)
Aug. 14-15: Mansfield, Mass. (Tweeter Center)
Aug. 18-19: Camden, N.J. (Tweeter Center)
Aug. 21-22: Atlanta (Turner Field)
Aug. 24-25: Dallas (Smirnoff Music Center)