The track, entitled ‘Part Of Me’, has been posted on YouTube and various other file-sharing websites.

It has apparently been produced by Dr. Luke and sees the singer recall the demise of a relationship.

Meanwhile, Perry, who is married to British comedian Russell Brand, is due to embark on two UK tours in 2011.

The nationwide dates - in the spring and autumn - form part of the star’s worldwide California Dreams jaunt.

Perry released her new album ‘Teenage Dream’ earlier this year. It has gone on to become one of the year’s biggest-sellers.

(by Jason Gregory)