Reese Witherspoon joined country singer Kenny Chesney onstage for a special duet of Johnny Cash's "Jackson" at the House of Blues in New Orleans.
The actress and other celebs are in New Orleans to raise funds for Drew Brees' The Dream Foundation and Matthew McConaughey's charity, Just Keep Livin'.
(See Brad Pitt throw a beer to Matthew balcony to balcony we blogged yesterday in New Orleans.)
Watch the TMZ video
Witherspoon dropped $24,000 for the chance to sing with Chesney.
Worth every penny. We LOVE Reese! She's fantastic.