"World's greatest 'gurner' offers $15,000 reward to anyone who can twist their face up more than him."

This is a face only a mother could love... but from now on you should have no trouble putting a name to it.

Tang Shuquan, 43, may appear very, very ugly in these pictures buthis look has won him the GuinnessWorld Record for making the most twisted face.

And now, he's launched a challenge to the public to see if anyone out there can match him.

He perfected his art for seven years to create the most screwed up facepossible before unleashing his unique talent on the world 10 years ago.

In March he took part in an Italian Guinness World Records TV show on the country's Channel 5 and yesterday was awarded $10,000 inprize money and a Guinness medal.