Sarah HardingSarah Harding has always appeared to be the ultimate cheery party gal.

So we were rocked to the core to hear her latest confession.

She's come clean on the rough period she went through.

In an amazingly frank admission, Sarah has bared all about the tough times in her life, in the new Girls Aloud biog, Dreams That Glitter.

"I was totally miserable for the first three years of Girls Aloud," Sarah said.

"I just didn't feel I belonged... I probably alienated myself from the girls and it affected my relationship with them for a while."

Referring to her old boyf, Mikey Green, Sarah continued:

"Around the time me and Mikey first split up, I was having a really bad time and everything just hit me.

"I was at the end of my tether. I nearly had a nervous breakdown. I hadn't got any friends in London, no family.

"I started drinking a bit too much and felt I had to get home to my mum. I'd not solidified my relationship with the girls, my relationship with Mikey had broken down and I had nothing left."

But luckily things got better for Sarah: "I came back and was fragile for a little while but just got on with things, concentrated on my career."