Liv's 2 dads: Todd Rundgren visits American Idol with Steven Tyler

Todd Rundgren sits in the audience of American Idol on the night 

contestants sang selections from artists in the Rock and Roll Hall of Fame.

I think the air date was April 6 or 7, 2011 on Fox Television.

 GO HERE:

http://en.wikipedia.org/wiki/Todd_Rundgren

Ironically, Todd is not an inductee of the RRHoF.