I think it was actually a World Series game, 1985 Candlestick Park. http://www.youtube.com/watch?v=azqp5Qxxvnc&feature=related He also sang the national anthem at the 1981 NFC Championship Game in San Francisco, the game of 'The Catch' against the Dallas Cowboys. But never at a Super Bowl. Huey Lewis and the News also sang the national anthem at MLB All Star game, I believe in the late 80's held in Pittsburgh.
Bill Joel sang the national anthem at Super Bowl XLI (Super Bowl 2007).
Christina Aguilera sang the National Anthem at Super Bowl XLV (45).
Garth Brooks sang the national anthem at Super Bowl XXVII.
Super Bowl XLV (2011) National Anthem will be sung by Christina Aguilera.
Christina Aguilera sang the national anthem at Super Bowl XLV.
Neil Diamond sang the National Anthem for Super Bowl XXI
Christina Aguilera will sing the national anthem at Super Bowl XLV.
yes, Carrie Underwood sang the National Anthem at Super Bowl XLIV.
Anita Bryant was the first performer to sing the National Anthem at a Super Bowl, which was Super Bowl III in 1969.
Bon Jovi has never sung our national anthem at the Super Bowl.
Yes, at Super Bowl XXXIII.
Natalie Cole and the Atlanta University Center Chorus, performed the National Anthem at Super Bowl XXVIII