Will JOAN JETT be stepping in for Kurt Cobain at the Rock & Roll Hall Of Fame Induction concert???  

That's the rumor going around, based on this Instagram picture from the Foo Fighters, with Joan's Gibson Melody Maker lined up next to instruments belonging to Nirvana's Krist Novoselic and Pat Smear:

 It's a VERY Nirvana choice, right?  Oddball, unexpected, gender-bending, yet with a certain warped brilliance.  We'll find out tomorrow!