Rocker will take a break from Broadway 'Rocky Horror' role to strap on electric guitar for gigs with her group in April, May.
Joan Jett and the Blackhearts, UB40, ODB, Alanis Morissette, Dave Matthews, Marty Stuart, Lenny Kravitz, War, Heavy D, Neko Case, Geri Halliwell...
Sandy West, legendary girl band's drummer, also in attendance at Blackhearts gig.
Also due Tuesday: Bouncing Souls, Psapp, Elvis Costello, Camera Obscura, Cracker, Paper Chase, Joan Jett.
Album, due in November, includes Joan Jett cover produced by Rodney Jerkins.