She was always one of the more curvy members of Girls Aloud.

But as Nadine Coyle stepped out in London yesterday the 24-year-old looked shockingly slender.

The Irish singer covered her frame with a loose black blazer and shift dress. But there was no disguising her pin-thin legs as she met record producer William Orbit.

Has she taken the dieting too far? Nadine Coyle looked incredibly slender as she walked through London's West End yesterday

Nadine is now permanently based in Los Angeles, where the pressures to remain in shape are notorious.

But from the look of things she may have taken it too far.

Her dieting made headlines in May last year when she shocked diners at upmarket London restaurant The Ivy by producing a pair of scales from her bag.

She then proceeded to weigh her meal of plain fish with no vegetables, before sending half back to the kitchen.

Solo career: Nadine was meeting with record producer William Orbit

Since Girls Aloud decided to take a break Nadine has been busy working on launching her solo singing career. Her first album is said to be nearly complete.

She also owns a bar in California, Nadine's Irish Mist, run by her parents.

Curvy: Nadine before her weight loss

But her bandmate Kimberley Walsh has said that Nadine's ambitions may be interfering with the band's planned comeback.

She told the Metro: 'I miss the girls. The plan is... well, basically Nadine needs to come over from LA.

'We need to chat and book it in because there are five people's diaries to work around, rather than just one.'

Nadine denied she was stopping the band getting back together.

But a source told Heat magazine: 'The other four are in regular contact and see each other when they're not working. Nadine holds them back.

'She's so far removed from the band it's like she's left already. Nadine's jealous. Once upon a time, Nadine was the 'lead singer', the one the tabloids wrote about. Now everyone's forgotten about her.'

After the band took a break last year, they signed a new deal which ties them to a further three albums.

But in the meantime they have all been pursing their own projects.

Cheryl Cole, 26, has had the most success after launching her solo career on the X Factor last year, bagging a No.1 single, Fight For This Love, followed by a chart-topping album, 3 Words.

Sarah Harding, 28, who has just returned from a Barbados break with DJ boyfriend Tom Crane, went down the actress route and filmed St Trinian's 2 last year.

Nicola Roberts, 24, has launched her own make-up range, and also made a BBC documentary this year, The Truth About Tanning.