Linda Ronstadt is 77 years old today. A singer and songwriter who has performed on over 120 albums, Ronstadt has collaborated with artists from a diverse spectrum of genres including Billy Eckstine, Frank Zappa, Rosemary Clooney, Flaco Jiménez, Philip Glass, Carla Bley, The Chieftains, Emmylou Harris, Gram Parsons, Dolly Parton, Neil Young, Johnny Cash and Nelson Riddle.