Barbra Streisand: Her Words & Music (1976)
Broadcast during Christmas 1976, this radio special featured many of Streisand's greatest hits, accompanied by interviews with Ms. Streisand, Ryan O'Neal, Dustin Hoffman, and James Caan.
You can listen to the show below (Many thanks to Jeff Bazell).
[Note: below is an edited version of the special, with most of the songs cut out; approx. 15:49.]