Alicia Keys

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Amy Sussman/Getty Images

Happy Birthday! The singer celebrates the big 4-0 on Jan. 25.

Chris Evans

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Noam Galai/Getty

Captain America turns 40 on June 13.

Justin Timberlake

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Larry Busacca/Getty

The father of two turns the big 4-0 on Jan. 31.

Beyoncé Knowles

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Dave Benett/WireImage

Queen B celebrates on Sept. 4.

Kelly Rowland

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Cindy Ord/Getty

Beyoncé’s bestie also turns 40 this year, on Feb. 11.

Jessica Alba

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Phillip Faraone/Getty

Let’s get Honest: Alba turns 40 on April 28.

Britney Spears

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Kevin Mazur/WireImage

Spears was “Born to Make You Happy” on Dec. 2.

Meghan Markle

The Duchess of Sussex will celebrate the milestone on Aug. 4.

Amy Schumer

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Noam Galai/WireImage

Nothing funny here: Schumer is 40 on June 1.