This is a Radio Promo CD of Girls Aloud's second single "No Good Advice", signed by all 5 members, Cheryl, Kimberley, Nadine, Nicola and Sarah. I bought it on Ebay.
Girls Aloud Wikipedia Entry: http://en.wikipedia.org/wiki/Girls_Aloud
Girls Aloud Official Website: http://www.girlsaloud.co.uk/site.php