Since her split from husband Ashley, Cheryl Cole's slender figure has led to much debate.

But it seems her tiny frame isn't simply down to a broken heart.

The 26-year-old has revealed she sticks to Eat Right 4 Your Type diet, in which she eats and avoids specific foods based entirely on her blood type.

Busy girl: Cheryl Cole looks skinnier than ever as she arrives at Heathrow from Dublin today after performing with the Black Eyes Peas

The effects could be seen today, as Cheryl flew into Heathrow from Dublin, where she performed a 30-minute gig as a support act for the Black Eyed Peas.

Her skinny legs were highlighted by her tight leggings and strappy high heels, while even her clumpy leather biker jacket couldn't hide her frame.

In an interview with Hello! today she admitted to watching what she eats.

'I watch what I eat, not to stay slim but to feel good,' she said.

'Recently my mother told me about Eat Right 4 Your Type, in which you're told what to eat and what to avoid depending on your blood type.

'It has made such a difference - not so much to my shape, but to how I feel and my energy levels. Before I was like 'energy schmenergy' and didn't believe it. But now I believe it 100 per cent.'

Strict: Cheryl has admitted to following the blood type diet, Eat Right 4 Your Type, but says she doesn't deny herself anything she craves, especially cupcakes

Stars including Australian supermodel Miranda Kerr, Martine McCutcheon and Sir Cliff Richard have previously admitted to following the plan.

And while her fans may be hitting the gym to try and emulate Cheryl's figure, it seems she doesn't have to.

'I have a really hectic schedule but it does have some health benefits - I get to work out without working out,' she said.

'It's literally full-on performances back to back, and all the choreography, training and rehearsals that go into them, that's a real workout.'

On stage: Cheryl supporting the Black Eyed Peas in Dublin at the weekend; she says performing is all the workout she needs

And Cheryl, currently taking a break from her band Girls Aloud, says she doesn't deny herself her favourite treats - especially cupcakes.

'My only trouble is that I can't do without sugar,' she said. 'I think I might have some sort of sugar imbalance. Sometimes I feel like I just need a chocolate bar.

'To be honest you can't put yourself under that much pressure, so I don't deny myself anything.'