The Presidents of the United States of America (PUSA), a two-time Grammy-nominated group behind the hits “Lump” and “Peaches,” is offering up its entire catalog in a $3 iPhone app called The President’s Music – PUSA.

The app’s pricing is interesting because it is much cheaper than their music in the iTunes Music Store, which is $0.99 per song. The app’s music can only be listened to using the app, while the songs available in the iTunes Music Store are DRM-free. The app has a “buy song” button that lets you purchase the song using the iPhone’s wireless Music Store, so there is a subtle but clever sales pitch going on.

Unlike most bands, PUSA owns the rights to its music and can do pretty much whatever it wants with it. The band promised to keep the app updated with “Extras and Exclusives, a regularly updated playlist of demos, live tracks and other oddball stuff.”

The President’s Music – PUSA is a 99-cent download in the iTunes App Store.