Wood greeted Slash backstage, posing for photographers and socializing with the former Guns N' Roses lead guitarist, and then came out during the encore for the GNR hit "Paradise City."

Slash's repertoire during the evening was largely composed of cover songs by the Stones, Black Sabbath, Queen, Led Zeppelin, and other classic rock artists.

It's not the first time the two have played together--most recently, Slash joined Wood onstage at the Shepherd's Bush Empire in the U.K. in December while Wood was playing a solo show.

Slash has known Wood since he was 13 years old--Slash's mother used to make stage costumes for Mick Jagger and other members of the Stones. A portrait of Slash, painted by Wood, can be seen on Wood's website, ronniewood.com, which features the Rolling Stones guitarist's artwork.

The Rolling Stones next play Saturday (November 2) at Edison International Field in Anaheim, California.

-- Phyllis Pollack, Los Angeles

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This setlist is from Billy Morrison's site:

20th Century Boy
Jean Genie - with Michael Wincott
Pretty Vacant - with Billy Duffy and Jon Clayden
Brown Sugar - with Marc Ford and Fab (Strokes)
Roadhouse Blues with Marc Ford and Johnny Fayva
Paranoid - with Casy Chaos (Amen) and Twiggy Ramirez
Whole Lotta Love - with Perry Farrell, Slash and Steven Perkins
Brass In Pocket - with Macy Gray
My Generation - with Billy Duffy and Wes Scantlin (Puddle Of Mudd)
Should I Stay Or Should I Go - with Duff McKagan and Steven Perkins
New Rose - with Duff McKagan
Fat Bottomed Girls - with Slash
I wanna Be Your Dog - with Slash, Duff McKagan and Michael Wincott
Time Warp - with Sebastian Bach, Duff McKagan and Slash
Paradise City - with Ronnie Wood, Slash, Duff McKagan, Sebastian Bach and Wes Scantlin.