In the black: singer is estimated to have built £10m fortune

She might be married to a man who is in jail on remand, battling drug addiction and the subject of a police investigation into an alleged assault, but life's not all bad for the singer Amy Winehouse.

One recent poll found that the 24-year-old is the "ultimate heroine" for Britain's young people, and she has just been nominated for three Ivor Novello awards. Yet perhaps more comforting to Amy Winehouse is the fact that she is really rather rich.

She makes her debut in this year's Sunday Times Young Music Millionaire's list, entering at number 10 in the list of the top 100 richest people in music in Britain aged 30 and under. Her estimated fortune is £10m.

Other new entries include the X-Factor winner Leona Lewis in 14th place, with an estimated £6m. Corinne Bailey Rae, whose husband died of a suspected drug overdose last month, and Natasha Bedingfield are also both worth £6m.

Top of the list is Dhani Harrison, son of the late Beatle George, who shares a £160m inheritance with his mother, Olivia.

The highest new entry in the list is the Manchester-born fashion model Karen Elson who is in sixth place and who shares her £25m fortune with her husband, Jack White, of the White Stripes.

The British-Georgian singer Katie Melua, who released her first album, Call Off The Search, at the age of 19, has more than doubled her wealth to £18m, taking her to seventh place.

Others in the list include the violinist Vanessa-Mae, said to be worth £32m, Joss Stone (£12m) and Charlotte Church and Gavin Henson (£11m). The Welsh mezzo-soprano Katherine Jenkins is reckoned to be worth £9m, the 28-year-old jazz pop star Jamie Cullum £5m.

Three of Coldplay's members also make it on to the list, Guy Berryman, Jonny Buckland and Will Champion, are each estimated to be worth £30m. The band's frontman, Chris Martin, only misses out because he is 31.

Winehouse, who is currently working on another album with the producer Mark Ronson, is believed to have accrued the lion's share of her wealth through sales of her 2006 album Back to Black.

She is also rumoured to have signed a £1m book deal with the publisher Penguin to write about her marriage to Blake Fielder-Civil, who is currently in prison on remand over a charge of conspiracy to pervert the course of justice.

Police are expected to question Ms Winehouse about an alleged attack on a 38-year-old man in north London at 3am on Wednesday. The man has told police that he was headbutted by a woman outside the Bartok bar in Camden.

She won five Grammys at this year's awards and was nominated for three Ivor Novello awards this week – two in the best song category and one in the most played British song category for "Rehab".

Multimillionaires – and they're under 30

1 Dhani Harrison - £160 million

2 Vanessa-Mae Nicholson

- £32 million

3= Guy Berryman (Coldplay) - £30 million

3= Jonny Buckland (Coldplay) - £30 million

3= Will Champion (Coldplay) - £30 million

6 Karen Elson and Jack White - £25 million

7 Katie Melua - £18 million

8 Joss Stone - £12 million

9 Charlotte Church and Gavin Henson - £11 million

10= Craig David - £10 million

10= Amy Winehouse - £10 million

10= Will Young - £10 million

13 Katherine Jenkins - £9 million

14= Corinne Bailey Rae - £6 million

14= Natasha Bedingfield - £6 million

14= Leona Lewis - £6 million

14= Simon Webbe - £6 million

18 Jamie Cullum - £5 million

Source: Sunday Times Young Music Millionaires list

Click here to see Britain's top 50 music millionaires.