Madonna has reportedly been offering Britney Spears pregnancy advice. The mother-of-two, who has become close friends with the 23-year-old singer, was only too happy to oblige when Britney wanted an expert to help guide her through her first pregnancy. A source said: "When Britney found out she was expecting one of the first things she did was phone Madonna. "Madonna has been sending books and offering advice about pregnancy to Britney almost daily." Earlier this year, it was claimed Britney, who is married to dancer Kevin Federline, had asked Madonna to be godmother to her firstborn - even though she wasn't pregnant at the time. The sexy singer was said to have been so thrilled when Madonna agreed she gave her a diamond-encrusted Cartier watch. The two celebrities have been friends since the 'Material Girl' introduced Britney to the mystic Jewish faith the Kabbalah over a year ago.

Madonna has since laden the young star with lavish gifts including a 900-year-old Kabbalah book - worth thousand of pounds - as an engagement present.