Madonna and her husband Guy Ritchie attended a service at a Kabbalah centre in Marylebone late on Friday on the eve of the singer's 50th birthday, dailymail.co.uk reported.

So far news about how Madonna will celebrate her half century on Saturday has been kept secret.

Unconfirmed reports revealed that Ritchie, keen to give his wife the ultimate birthday gift, has given in to her demands to adopt a second Malawian child.

Many of the marital difficulties the couple have experienced over the past year have surrounded the singer's determination to adopt again, and Guy's refusal to give in.

Yet the Snatch director has agreed to go ahead with adopting three-year-old Mercy James. The family has already adopted Malawian child David Banda and the singer has two other children - a son, Rocco, and a daughter Lourdes.

According to Guinness World Records, Madonna is the most successful female solo artist, selling about 120 million albums and 40 million singles.

Despite turning 50, it does not look like she is planning on abandoning or slowing down his stunning career.

The pop star is now preparing for her Sticky And Sweet world tour.

To mark her special day, MSN entertainment polled more than 1,200 Madge fans who named Like A Prayer as her best song of all time. The album of the same name also topped the poll as Madonna's best.

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