Nancy Sinatra Got Dumps Like a Truck

6/12/2008 8:00 AM PDT BY TMZ STAFF
What, what? Nancy Sinatra refused to sing "These Boots are Made for Walkin'" for us on Capitol Hill yesterday-- but our camera guy still got one surprise: An appearance from where-the-hell-has-he-been artist Sisqo!

Yeah, we should have asked 'em to do a duet of "The Thong Song." Maybe next time.