Forty-two years ago today, Merle Haggard and Willie Nelson were at the top of the country albums chart with a collaborative classic.

Watch a young, clean-shaven Willie Nelson perform one of his earliest songs, "Funny How Time Slips Away," in 1962.

Bob Dylan, seen here in a 2012 AP file photo, is performing this Friday as a headliner at the Outlaw Music Festival near East ...