She won the U.S. Library Of Congress' Gershwin Prize for her lifetime achievements and is feted by a host of famous musicians who were influenced by her work over the years. But perhaps the most anticipated part of the upcoming PBS special is that the 79-year-old Mitchell, once slowed by a stroke, is said to have done a rare performance on the show. 

Among those paying tribute and performing: James Taylor, Annie Lennox, Cyndi Lauper, Brandi Carlile, Graham Nash, Diana Krall, Herbie Hancock and more.

The special airs on most PBS stations in primetime March 31st, but for some reason, WNED Buffalo has chosen to show it on Sunday, April 2nd at 4:30 PM, with a repeat at 2 AM three days later.

You can see the preview here

And while we're on the topic, here's a classic story I'd never heard before.

Who is Joni Mitchell's 'Help Me' written about?