Robin Thicke regularly gets mistaken for being Simon Cowell.

The 36-year-old singer - who is 18 years younger than the X Factor boss - often gets heckled in the street by people shouting "Simon" at him because they think he is the music mogul due to their similar haircuts. "I went through a hippy phase when I started out in music and said I would not cut my hair until I heard my song played on the radio. Now I do get called Simon Cowell because of my hair," he said.