With lyrics like "I’m a soldier marchin’ in an army / Got no gun to shoot / But what I got is one guitar," Willie Nile's song "One Guitar" could not be more relevant for the day's events. As a bonus, be sure to watch Nile perform with the legendary Bruce Springsteen back in January.

Pete Seeger's "We Shall Not Be Moved" may be most famous as a Civil Rights anthem, but it also started as a labor union song. What could be more appropriate?

Tom Morello will be leading the May Day Guitarmy, so naturally, his influential protest songs written for the Occupy Movement are essential. So do as he says and "sing out loud all night long."

While "This Land Is Your Land" is a favorite with elementary school kids, Woodie Guthrie's classic also addresses important concepts about today's world, with its borders and fences. Start a sing-along with one with your fellow protestors.

“Which Side Are You On?” by Florence Reece is another must-have. It was originally written for mine workers during a union struggle in the 1930s, but its timeless themes fit today's situation perfectly. "Oh workers, can you stand it? Oh, tell me how you can? Will you be a crummy scab or lend us all a hand?"