Sexy pop star Britney Spears has reportedly mastered the art of giving oral sex, after getting expert tips from Sex And The City star Kim Cattrall.

Britney Spears, who is eight months pregnant with her first child, is said to have finessed the art of delicate sexual moves, including fellatio, after purchasing sex manual Satisfaction: The Art of the Female Orgasm written by Kim Cattrall.

The book contains numerous graphic diagrams complete with instructions on how to perform a variety of sex acts and different positions for sexual intercourse.

According to the makers of a documentary, Britney's redneck Roots, the Toxic singer, who is now married to dancer Kevin Federline, purchased the manual while dating pop heartthrob Justin Timberlake. The programme, however not feature the gossip, for fear of upsetting Britney.

"Although we are sure this is a piece of juicy gossip which would go down well with her fans, the producers decided to it would be best to keep off the sex angle," Femalefirst quoted an insider as saying.