Britney Spears, Christina Aguilera, Leona Lewis and Beyonce Knowles are set for a mega chart battle in the U.K. next month (Nov08) when all four singers release their new singles on the same day. Spears' WOMANIZER and Aguilera's KEEPS GETTING BETTER will go head to head with Lewis' FORGIVE ME and Knowles' IF I WERE A BOY ON 3 November (08).