E! Online - Cocktail waitress/actress Sheana Marie may have once had a shot at something with John Mayer, but not anymore.

E! Online - The way John Mayer uses Twitter, you'd think he would have nothing but high praise for the social networking phenomenon.

E! Online - John Mayer and the Jonas Brothers have the same new woman—Jordin Sparks!

E! Online - Jennifer Aniston and John Mayer may have called it quits.

Add Robert De Niro and you've got yourself an opening night bill trying to please everyone on a show that's otherwise clearly about targeting young men and their twitter accounts. So maybe the Astral Weeks-pimping Van Morrison fit on the show about as well as he did that silly suit (although "Sweet Thing" is and forever will be the jam), but the...