OK here's the big one -- Metallica's 1991 masterpiece, simply titled 'Metallica' and known fondly as the "Black Album."

This multimillion selling record found the group both simplifying their songwriting and sharpening their production with the help of Bob Rock. The album brought the already extremely popular band to an insane level of stardom, and for better or worse remains their defining statement to this day.

So which one song would you choose as the Black Album's best? The evil opening lullaby 'Enter Sandman?' the sludgy crawl of 'Sad But True?' One of the eternal radio staples such as 'The Unforgiven' or 'Nothing Else Matters? All we can say is we're glad the choice isn't up to us. Have fun and good luck.