They must have the biggest tourbus in the world...

Polyphonic Spree have announced details of a North American tour that will include two shows in CHICAGO, BOSTON, PHILADELPHIA and NEW YORK.

The jaunt will also take in a single gig in Washington DC to support the release of their second album ‘Together We’re Heavy’.

The band will appear on the Late Show with David Letterman on August 27 and in early August the Polyphonic Spree will tape an episode of Austin City Limits, which will air in November. A recently filmed performance on ‘The Late Late Show With Craig Kilborn’ will hit US airwaves tonight (July 27).

‘Together We’re Heavy’ was released Stateside through Hollywood Records on July 13.

Polyphonic Spree tour dates are:

Chicago Park West (August 13-14)

Washington DC 9.30 Club (16)

Boston Paradise Rock Club (18-19)

Philadelphia First Unitarian Church (21-22)

New York Irving Plaza (24-25)

New York Late Show With David Letterman (26)