Robbie Williams Celebrates His 41st With Birthday Suit Selfie

Cheeky Robbie Williams has shown off his impressive physique by stripping naked on his 41st birthday on Friday (13Feb15).

Wearing nothing but a wristwatch, a necklace and a grin, the tattooed former Take That star offered fans a glimpse of what he sees in his bathroom mirror when he posted a naked full frontal shot of himself on Instagram.com.

Cupping his hands over his genitals, Williams showed off an impressive six-pack as he posed for the camera.

His birthday surprise comes less than a week after Williams posted another naked shot online and called himself a "naturist", adding, "I enjoy nakedness. I am a bit of a naturist at heart. What about you?"