Zac Brown Band has opened for Dave Matthews Band at several festivals and headlining shows this summer. During his performances, Brown occasionally tells a story about sneaking out to see Dave Matthews Band play around the Southeast when he was younger. Friday night Brown finally had a chance to sit in with the members of Dave Matthews Band. Partway through Dave Matthews Band’s show at Washington, DC’s Nationals Park, the rising country star joined Dave Matthews Band for a cover of Willie Nelson’s “Funny How Time Slips Away.” The collaboration worked and, two nights later, Brown sat in with Dave Matthews Band on the same song at Louisville, KY’s HullabaLOU Music Festival. Matthews covered “Funny How Time Slips Away” regularly in 2001 and 2002. Please click here to look back on Zac Brown’s recent Relix On the Verge profile.