JAMIE FOXX appears on "Dateline" tonight with his younger sister DeOndra Dixon . . . who has Down syndrome. And he admits he's learned an important lesson from her.
He says, quote, "I learned how to live. Sometimes we get caught up in our world on the extras of everything: 'Ah, the Mercedes is not the right color!'
"Then you see this girl over here, 'I just want to live. I want to dance. I want to love.' So she brings you back down to what life is."
(Here's a clip.)