The girl group will release 'Beautiful Cause You Love Me' on December 17 as the second single from their upcoming greatest hits collection Ten.
The track begins with Cheryl Cole singing: "Staring into the basin I've been washing my face in/ Jet black mascara racing/ Down my cheeks 'til I taste it."
The chorus includes the lyrics: "Right now the whole world could call me ugly, so what, to you, I'm not/ You don't love me cause I'm beautiful/ I'm beautiful cause you love me."
'Beautiful Cause You Love Me' was written by Maiday and produced by Jim Elliot (Kylie Minogue, Ladyhawke).
"After I heard the first line, I said, 'STOP! That's our song'," Nicola Roberts said.
Kimberley Walsh added: "As soon as I heard it, from the first line onwards, I agreed with Nicola – we had to get that song."
'Beautiful Cause You Love Me' will serve as the follow-up to Girls Aloud's new single 'Something New', which is released on November 18.
Their retrospective collection Ten - to celebrate their 10-year career - will follow on November 26.