"Cheryl looks so different'

As fans speculate on the singer's changing appearance, a source tells new Cheryl may have had "a few tweaks"

- Shelley Spadoni & Jess Clarke

Pop group Girls Aloud, looking as glamorous as ever, were the talk of the town when they stepped out together recently at a London Fashion Week event in Mayfair.

Bandmates Kimberley Walsh, Nadine Coyle, Nicola Roberts and Cheryl - who last November revealed they are to reunite for an arena tour this year in memory of their late bandmate, Sarah Harding - stole the show as they attended the Perfect Magazine and AMI Paris Party.

But the band member who turned most heads was former X Factor judge Cheryl, 40, as she debuted a new look - her hair in a high bun with a choppy fringe- and not a wrinkle in sight. She wore a sheer black floor-grazing dress with cut-outs and lace detailing, and accessorised with a pink satin clutch.

There's no denying the star has undergone quite the transformation since she first hit our screens as a fresh-faced 19-year-old in 2002 on Popstars: The Rivals, becoming the first contestant to qualify for the girl group.

In subsequent years, Cheryl has switched up her looks and style regularly, often heading to showbiz events in a raunchy outfit or sporting a brand new hairdo when we least expect it.

But her changing looks have also had fans speculating that she could have had tweakments to help hold on to that ageless appearance something Cheryl has always denied.

"Cheryl looks like she's had some sort of cosmetic procedure done on her face," one person said online.