The fifth annual Light Up The Blues, an autism benefit concert organized by Stephen Stills and his wife Kristen, went down on Saturday night (4/21) in Los Angeles, and had many special, surprise collaborations. Mike Campbell, Benmont Tench and Steve Ferrone of Tom Petty and the Heartbreakers played together for the first time since Petty's death, including a performance of Petty's "I Won't Back Down" with Stills on vocals. The three Heartbreakers also backed Beck for his songs "Where It's At" and "Guess I'm Doing Fine," Patti Smith for her classic "Because The Night," and Sheryl Crow for "Long Way Back" and "Everyday Is A Winding Road," which also had Stephen Stills on guitar.

Sheryl Crow also teamed with Burt Bacharach for their collaborative "Dancing With Your Shadow" from the A Boy Called Po soundtrack, which they had never performed live together before.

Neil Young was the evening's headliner, and he began his set with a few solo songs, before bringing out Stephen Stills for a few of their collaborations from over the years: The Stills-Young Band's "Long May You Run," and Buffalo Springfield's "For What It's Worth" and "Mr. Soul." Neil ended his set by bringing his pal Patti Smith on stage for her anthemic "People Have The Power."

Neil also joined Stills, Burt Bacharach, and Sheryl Crow on stage for show-closer "What The World Needs Now Is Love," and eventually the rest of the all-star cast joined too. Watch a bunch of videos from the night and see the setlist (not in order) below.

SETLIST (via)

Neil Young
Sugar Mountain
I Am A Child
Mother Earth (Natural Anthem)
Long May You Run (with Stephen Stills)
For What Its Worth (with Stephen Stills)
Mr Soul (with Stephen Stills)
People Have The Power (with Patti Smith)

Patti Smith
Because The Night

Stephen Stills
I Won’t Back Down (with The Heartbreakers)
Handle With Care (with Judy Collins)
What The World Needs Now Is Love (with Burt Bacharach and Neil Young)

Burt Bacharach
Dancing With Your Shadow (with Sheryl Crow)
What The World Needs Now Is Love

Beck
Guess I’m Doing Fine
Where Its At/One Foot In The Grave

Judy Collins
Both Sides Now

Sheryl Crow
Long Way Back
Everyday Is A Winding Road