Katy Perry has hit a high note: She's been named No. 1 on Maxim's 2010 Hot 100.

The 25-year-old singer – who's engaged to Russell Brand and drops a new album this summer – is "a triple — no, quadruple — kind of hot," Maxim Editor-in-Chief Joe Levy tells UsMagazine.com. "It's that feeling you get when you suddenly realize 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."

Brooklyn Decker, who landed the coveted cover girl spot on this year's Sports Illustrated Swimsuit Issue, ranked No. 2, edging out Zoë Saldana (No. 3) and Blake Lively (No. 4). "This fiery Victoria’s Secret model makes even our female staff stop and stare," the Maxim editor told Us.

Megan Fox, who was No. 2 last year, slipped to No. 5. The magazine still calls her "a sex symbol for the ages. Megan’s sultry looks hit every red-blooded guy right in the gut."

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Rounding out the top 5: Rihanna, George Clooney's Italian girlfriend Elisabetta Canalis, Olivia Munn, Kim Kardashian and model Marisa Miller.

Last year's No. 1 girl, House star Olivia Wilde, dipped to No. 20. Wilde still managed to edge out Taylor Swift and Jessica Biel (Nos. 31 and 32, respectively) and Angelina Jolie (No. 38).

Missing from the list altogether: Jennifer Aniston.

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