As you catch a ball game or fireworks display this Fourth of July weekend, you're probably going to hear "The Star Spangled Banner."

Our National Anthem is a song that can be inspiring when sung well, but brutal on the ears when sung poorly.

One man is on a personal mission to prevent cringe-worthy moments for singers. UCLA professor Michael Dean offers a how "NOT" to butcher The National Anthem class to help save singers' egos and our ears.

Dean has taught scores of pop stars how avoid humiliation by teaching them not only the technique of the song, but its meaning. "If it's just a lot of nonsense words then the audience is going to perceive it as a lot of nonsense words. So studying why this piece was originally written is a very important for the singer to do," says Dean.

"The Star-Spangled Banner" was written after Francis Scott Key watched a battle during the War of 1812 and was named America's National Anthem in 1931 by President Hoover.