In a 1970s hit, Waylon & Willie urged, "Mammas don't let your babies grow up to be" these
I first saw country music legend Willie Nelson perform in 2001 at the Zellwood ... 
Before the 1970s, no one had successfully mixed country's down-home ... 
collaborations with Merle Haggard, Waylon Jennings, Johnny Cash and Kris 
Kristofferson.