XM Satellite Radio has added the Live Earth concert in Washington, DC to its Live Earth coverage roster. The concert is a surprise addition to the Live Earth lineup and almost didn't happen.

Former Vice President Al Gore just yesterday announced the concert will be held on the National Mall at the National Museum of the American Indian, about two blocks from the Capitol. Tentatively scheduled to begin at 10:30am ET on July 7th, the event will be the earliest US concert.

XM will carry the performances from Garth Brooks and Trisha Yearwood, who are the only musical acts for the DC show (the rest are speakers). You can hear their performances along with other event highlights and interviews on XM's Live Earth All Access (ch 40).