Singer Robin Thicke says the women's breasts in his 'Blurred Lines' video "didn't knock his socks off".

The 36-year-old star's catchy hit featuring Pharrell Williams and T.I. has become an international sensation.

However, the explicit version of the accompanying music promo - which shows Thicke, Williams and T.I. surrounded by half naked women - has been branded inappropriate by some.

Thicke doesn't understand the furore surrounding the video - and admits he wasn't fazed by the topless women around him.

He laughed in an interview with British magazine Heat: "There are three girls, so mathematically that's three pairs of boobs. But, to be honest - and I've got to be honest - I've been around a lot of boobs. My wife has one of the most amazing pair of boobs you could ever see, so these ones didn't knock my socks off."

Thicke is married to actress Paula Patton, and he has previously explained she loves the concept of his much talked about promo.

He revealed: "Some of it was my wife's idea. My wife is an artist first and wife second. So she's my creative partner and muse. She was excited about it right away and loved the video and wanted to watch it like 10 times, then she would jump on my bones."