I have no idea how reliable this is, but anyway...

«From MarksFriggin:

Coming Soon To The Stern Show - Jim Carrey, Lena Dunham, Martin Short, Slash, Robert Downey Jr., John Mellencamp, Sarah Silverman, Donnie Wahlberg, Smokey Robinson, Lenny Kravitz, Pat O'Brien, Neil Young, Brian Wilson, William Shatner, Amy Poehler, John Mayer, - and more!»

http://www.dawgshed.com/index.php?threads/wow-look-at-this-list-of-upcoming-guests.125417/