"On his 57th birthday, I sent him an email and put something like, 'Happy birthday! Isn't it time you got a proper job?' I signed it 'Ricky Gervais, 42, comedian.' He sent one back saying, 'I have a proper job. David Bowie, 57, rock god.'" RICKY GERVAIS enjoys poking fun at his pal DAVID BOWIE.