Sara De Boer/Retna Ltd. 1 / 8
Sara De Boer/Retna Ltd. 1 / 8

Katy Perry has topped the list of sexy stars on Maxim magazine's annual Hot 100 countdown.

RELATED: See more pics of Katy Perry

The "I Kissed a Girl" hitmaker, who is engaged to British funnyman Russell Brand, fought off tough competition from "Transformers" babe Megan Fox, "Avatar" stunner Zoe Saldana and racy singer Rihanna to top the coveted annual poll.

RELATED: Katy Perry Imagined Conversations

Also featured in the top 10 are Brooklyn Decker, Blake Lively, Elisabetta Canalis, Olivia Munn, Kim Kardashian and Marisa Miller.

RELATED: Katy Perry's Seventeen cover story