Cadbury wants to get down with the kids in a new pop promotion on treatsize bumper bags supported by Billie, SCLUB7 and Westlife. The Cadbury and Popworld.com dual branded bags offer the chance to win money can't buy' prizes such as a shopping spree with Billie Piper. A chance to hang out with SCLUB7 in the US and a backstage pass to a Westlife concert are also up for grabs. Promotional bags of Crunchie, Twirl, Cadbury's Dairy Milk and Caramel will be available from this week (rsp £2.99). Limited edition packaging features pictures of the three pop outfits taking part. The on-bag promotion will be supported by Cadbury promotions and competitions at Popworld.com, a new web site for six to 16 year olds. Cadbury Trebor Bassett marketing director Mark Smith said: "Our partnership with Popworld will target our key target market from the credible pop music platform." {{P&P }}