LONDON (Reuters) - British actress Keira Knightley was voted the world's sexiest woman in a magazine poll on Thursday, beating model Keeley Hazel and Hollywood star Scarlett Johansson into second and third place respectively. The poll, which British magazine FHM said was based on two million votes, saw homegrown model and TV presenter Kelly Brook slip to 5th from first last year, while Angelina Jolie, expecting a baby in mid-May, came fourth. Beyonce Knowles was the sexiest pop star at number seven and Russian tennis player Maria Sharapova the top sportswoman at number 56. FHM said the poll was the...