ROLL CALL: John Mayer Pens Jennifer Aniston A Birthday Song

Your Daily Dispatch of Celebrity Shenanigans

John Pens Jen A Special Birthday Diddy: What do you get a celebrity who has pretty much everything? If you’re John Mayer and you’re looking to get Jennifer Aniston something special for her birthday (the actress turns 40 on Wednesday), you grab your guitar. “[John] did write a special song just for [Jen] for her birthday,” a source told People. Possibly, a sequel to “Your Body Is A Wonderland”?

Channing, Sienna & Dennis Dolls Debut!: Or, another possible gift for Jen could be a little plastic Channing Tatum doll. People has an exclusive first look at the “G.I. Joe: The Rise of Cobra” action figures which immortalize Channing Tatum, Sienna Miller, Dennis Quaid and other stars from the summer 2009 film in plastic. And what a great addition it could be to Jen’s “Step Up 2: The Streets” action figure set!

Kanye’s Little Black Book Spilleth Over: Kanye West’s birthday isn’t until June, but we’d like to buy him a new little black book or a memory upgrade for his iPhone, because according to The New York Post’s Page Six, the rap star has a good deal of new data to input – and by “data” we mean girl’s phone numbers. “Kanye had so many girls around him you couldn’t keep track. One second he had a girl on his lap, 10 minutes later, it was a new girl, and then again a new girl,” a source reportedly said of the rapper, who spied him recently at the Belvedere IX Vodka launch party at MyHouse. And, to further illustrate the need for our birthday gift idea, Kayne reportedly “ended up leaving the club with three different women, sneaking out the back door into his waiting SUV,” the source added. We’d also like to remind him of his hit song, “Gold Digger.”

Sharon Osbourne’s Nip & Tuck Kiss & Tell: And finally, Sharon Osbourne (who sounds like she had quite a few gift certificates to her local plastic surgeon) is spilling her nip tuck secrets to Ladies’ Home Journal. “My breasts, my face, liposuction, a tummy tuck, a leg lift. I’ve had everything you can think of,” Sharon told mag of the procedures she’s undergone, as reported by Page Six. “Except for my eyes and lips. I wouldn’t touch them.” After all, celebs always know when to say when!