Non rock: God Bless America sung by Kate Smith, which I think should really be our National Anthem.
Rock: David Lee Roth–Yankee Rose (this also qualifies and one of my favorite videos of all time). Honorable mentions: Surfing’ U.S.A–The Beach Boys, You Can Still Rock In America-Night Ranger, R.O.C.K In The USA–John Mellencamp, Lenny Kravitz‘s cover of American Woman