Pop superstar Madonna has launched a scathing attack on London's mayor Ken Livingstone - urging him to give tax breaks to struggling musicians.

The Holiday hitmaker, who has a home in London with husband Guy Ritchie and their three children, is furious at Livingstone's decision to introduce Congestion Charging to the city - insisting the levy has made traffic in the British capital worse than ever.

Motorists driving in central London are forced to pay a fee of $16 a day and face huge penalties if they fail to hand over the cash within 24 hours.

And Madonna insists the scheme is financially crippling for people starting out in the music industry - as they need cars to transport all their equipment.

She says, "I would make it so that young musicians wouldn't have to pay the Congestion Charge or taxes so they would have money for other things."

"All Red Ken (Livingstone) wants is roadworks everywhere. I'll just have to walk I guess."