It's just been announced that Josh will be part of "A Capitol Fourth" - part of a PBS celebration for Independence Day celebrations on the 4th of July.
Other artists to join Josh on the Capitol’s west lawn include Jimmy Smits (as host), Steve Martin, Matthew Morrison, Jordin Sparks, Little Richard.
The show will be telecast on PBS on Monday, July 4, 2011 from 8:00 to 9:30 p.m (check your local guides).
As is tradition, the show will conclude with a stunning pyrotechnics display set to a rousing rendition of Tchaikovsky's "1812 Overture" complete with live cannon fire provided by The U.S. Army Presidential Salute Battery.
More information - PBS A Capitol Fourth website.