Madonna on the Blocks

GUY RITCHIE has secretly commissioned genius graffiti artist BANKSY to do a portrait of MADONNA for her 50th birthday.

She loves his work, so Guy thought it would be the perfect gift for the Material Birthday Girl who celebrates the milestone next Saturday.

But Guy is desperate for the artwork, which could cost up to £500,000, to be finished in time for Madonna's lavish birthday bash.

A source revealed: "Guy's been feeling the pressure to get this right. He knows one of her passions is art and came up with the Banksy plan. He reckons Madonna will be blown away by the masterpiece which he hopes will arrive by next weekend."

Click to see 50 photos of Madonna through the years

Madonna's flying in to Blighty from New York for the party next weekend. A host of stars are set to attend at their Wiltshire mansion including pals GWYNETH PALTROW, hubby CHRIS MARTIN, and STING and his missus. Others invited include TOM CRUISE and KATIE HOLMES, CAMERON DIAZ and ORLANDO BLOOM.

SARAH JESSICA PARKER and MATTHEW BRODERICK want to patch up their marriage woes with a new baby. My source said: "It's been a tough year but they agree a child would be a fantastic statement of their feelings for each other."