From Hollywood Reporter:

Johnny Depp has the write stuff when it comes to signing autographs while Cameron Diaz is the worst, according to a new list Friday from Autograph Collector magazine. Depp, followed by George Clooney, topped the magazine's 14th annual survey of Hollywood's best and worst signers. The "Pirates of the Caribbean" star also was rated best last year.

"Many stars become bad signers once fame and fortune hits, but not Depp. He's even signed autographs for crowds at the airport while carrying luggage," said Steve Cyrkin, editor and publisher of the Santa Ana, Calif.-based magazine.

As for Clooney, "he'll joke as he signs, and make fun of how he looks in photos he's handed to autograph," Cyrkin said.

When it comes to her moniker, however, Diaz gets a flunking grade.

"Cameron Diaz may be a talented actress, but she's persistently a terrible signer. Instead of just turning down a person's autograph request, she'll lecture them about how dumb autographs are," Cyrkin said.