LONDON (Reuters) - American R&B singer Robin Thicke has scored his first number one in the British singles charts with "Blurred Lines", which became the fastest selling single of 2013, the Official Charts Company said on Sunday. The song, which features hip hop artists T.I. and Pharrell Williams, sold 190,000 copies during its first week on sale, knocking British rapper Naughty Boy's dance track "La La La", featuring London singer Sam Smith, into number two. "It is an honor and a pleasure to be number one in the UK. ...