John Mayer once had 3.7 million Twitter followers, but he managed to get into the Webby Awards unseen at the Hammerstein Ballroom Monday night. “He sneaked in the back door by the loading docks,” said a source who spotted the singer skulking at the “Oscars of the Internet.” Mayer was there to meet CollegeHumor’s Ricky Van Veen. The Webbys ask winners to give five-word acceptance speeches. “Sometimes geeks can be chic,” said Anna Wintour after she picked up a People’s Voice award. Host Lisa Kudrow wasn’t as brief with her comedy routine, which bombed with the tech crowd.