Jimmy Page joined The Black Crowes yesterday on stage in London, July 13 2011

The Black Crowes played 2 shows @ the Shepherd's Bush Empire in London and yesterday night (July 13 2011) Led Zeppelin's Jimmy Page joined them on "Shake your Money Maker":

The show was divided in two sets: 1 acoustic (9 songs) and 1 electric (10 songs) plus Encore ( 1 song) with Jimmy Page. Here's another video of the Jam with Jimmy
Full setlist HERE, click for videos "Thorn in my Pride", "Only Halfway to Everywhere".
Check this 7 min video of "Josephine" from the previous day July 12 @ Shepherd's Bush Empire.