Beyonce Knowles has topped a hip new poll of the Hottest Stars Under 25 in US rock magazine Spin. The former DESTINY'S CHILD singer beat basketball star Lebron James, Kelly Clarkson and Kirsten Dunst to claim the top spot. The top 10 also features Keira Knightley, Christina Milian, Mischa Barton and Arctic Monkeys frontman Alex Turner.