The 25-year-old singer has topped Maxim magazine`s annual Hot 100 list, narrowly beating Sports Illustrated Swimsuit Edition cover girl Brooklyn Decker and Avatar star Zoe Saldana, who came second and third. The magazine`s Editor-in-Chief Joe Levy says Katy is a deserving winner because she is "supernova hot".
"She is a triple - no, quadruple - kind of hot," Levy told UsMagazine.com. "It`s that feeling you get when you suddenly realise that the smartest, funniest, coolest girl you know also happens to the best looking and a pretty good skateboarder, too. All of sudden, your crush goes supernova, and this is Katy`s supernova moment."
Levy said Brooklyn came in second because she is so sexy that even women can`t help but stare at her. He praised the blonde beauty`s amazing body, stunning face and winning personality.
"This fiery Victoria`s Secret model makes even our female staff stop and stare," he said.
Zoe won third place, followed by Gossip Girl star Blake Lively and Megan Fox, who was number 2 last year.
Pop star Rihanna, George Clooney`s Italian girlfriend Elisabetta Canalis, US model and presenter Olivia Munn, reality star Kim Kardashian and Victoria-s Secret model Marisa Miller rounded out the top 10.
Kim, who was in 53rd place last year, was thrilled with her meteoric rise, posting on her Twitter account: "Maxim Magazine just released their Hot 100 for 2010 and I-m number 9!! Last year I was number 53!!!! Wow. This is such an honor! (sic)."
Taylor Swift, Jessica Biel, Angelina Jolie, Selita Ebanks and Chelsea Handler also appeared in the top 100.