We all love being at a concert and hearing the band say they want to invite a friend out to play with them. Here are another fourteen examples of some of those special occasions in the Vault.
1. The 1991 Memorial Concert for Bill Graham saw some outstanding sit-ins including this number when members of Los Lobos (Steve Berlin on sax is especially prevalent) and Bobby McFerrin joined in on the "Oye Como Va" jam.
2. At John Lennon's One-to-One Concert in 1972, "Give Peace a Chance" turned into a massive sing-along. Roberta Flack and Sha Na Na were on stage, but Stevie Wonder stole the song when he stepped up to the mic.
3. This beautiful rendition of "Believe" occurred at the 1991 Bridge School Benefit. Young watched most of the performance from the wings of the stage, but stepped out to provide some backing vocals and tasty harmonica to this touching number. (That piano Lofgren was playing was the same one he played for Young's "After the Goldrush" album.)
4-5. B.B. King took the time to tell the audience about the first time he saw Johnny Winter play before he invited both him and his brother Edgar out for a song.
6. On the night prior to this performance, members of the Paul Butterfield Blues Band joined Muddy Waters' band onstage to close the show. Here, during the final show of this legendary run, Muddy Waters and Luther Johnson return the favor by joining the Butterfield Band on a few numbers to close the show.
7-8. Galactic invited their friends from New Orleans, pianist John Cleary and bassist Cornel Williams, to liven up this funky jam.
9. Playing a show in the Bay Area, George Thorogood invites blues guitarist Elvin Bishop for some shredding during this extended "One Bourbon, One Scotch, One Beer" performance...you can hear him better when George isn't yapping.
10-11. This is Babatunde Olatunji's first performance on U.S. soil, long before he hooked up with Mickey Hart from the Grateful Dead.
12-13. Here, the charming Steve Goodman jammed wit