I have:

• run away from Sir Ian McKellen as he went out for dinner
• been recognised by Brian Littrell in the middle of a crowd
• ignored three Backstreet Boys at a meet-and-greet
• been hugged by Rufus Wainwright
• had a conversation with Daniel Radcliffe at the stage door
• presented Neil Gaiman with 9 pairs of black socks
• been within two feet of Justin Timberlake, Timbaland, and Jessica Biel
• almost poisoned AJ McLean (not my fault!)
• asked two Backstreet Boys about JC Chasez
• walked past Jennifer Saunders and not recognised her
• failed to notice Nick Carter mooning from two metres away
• been chased out of a celebrity afterparty by a bodyguard