By now you've heard about Billie Joe Armstrong, the frontman from Green Day....  He freaked out at the iHeartRadio festival in Vegas and now his friends and family have gotten him the help he needs (rehab.)  While he's away in recovery the band has had to cancel several concert dates and appearances.  One of those appearances was as the musical guest on the Jimmy Kimmel show.  Since they had to cancel, a friend of Billie Joe's decided to fill in for him and pay tribute to the band by doing a very unique cover of Basket Case.  A fitting tribute if you ask me.  Alanis Morisette is becoming cooler by the second.  Check out this performance!  Gave me chills...