LOS ANGELES —  Megan Fox is the sexiest woman in the world — at least according to FHM magazine.

The "Transformers" co-star tops FHM's annual 100 Sexiest Women in the World poll of FHM readers. The 21-year-old model-actress beat out the likes of Angelina Jolie (No. 12), Rihanna (No. 14), Kim Kardashian (No. 17), Paris Hilton (No. 77) and last year's champion, Jessica Alba (No. 3).

Fox debuted on the annual list in 2006 at No. 68 and ranked at No. 65 in 2007. Joining her in the top 10 this year are — in descending order — Jessica Biel, Alba, Elisha Cuthbert, Scarlett Johansson, Emmanuelle Chriqui, Hilary Duff, Tricia Helfer, Blake Lively and Kate Beckinsale. Britney Spears came in last place at No. 100.

• Click here for photos of Fox.

The women from MTV's "The Hills" duke it out on the list with Heidi Montag (No. 44) beating out Audrina Patridge (No. 80) and Lauren Conrad (No. 95). Current "Dancing with the Stars" contestant Shannon Elizabeth (No. 46) returned to the ranking after being absent last year, joining professional dancers Cheryl Burke (No. 40) and Karina Smirnoff (No. 78).

FHM said nearly 9 million votes were cast for the 14th edition of the annual poll.