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Cameron Diaz, Nicole Richie, Gwyneth Paltrow, 44th Birthday Party

AKM-GSI

Cameron Diaz rang in her 44th birthday as any person should: surrounded by her closest friends, loved ones and...food!

The actress celebrated the special day at a star-studded cooking class with her famous besties—including Nicole Richie, Joel MaddenGwyneth Paltrowand Brad Falchuk—as well as her hubby, Benji Madden.

The group hit up the New School of Cooking in Los Angeles, where they became chefs for the night and learned how to prepare a delicious meal.

"Cameron was having a great time," a source tells E! News. "[There was] lots of laughter. She looked very interested in her class. Everyone was very into it."

Paltrow took to Instagram to extend the birthday wishes to her best friend, sharing a selfie with Drew Barrymore.

"Dear @camerondiaz, before the day ends, I bid you a happy birthday," she wrote. "And I hit the ground with gratitude for getting to be one of the women who calls you a best friend."

So sweet!

Benji also shared a sweet message for his wife, who he married in January 2015.

"Happy Birthday to my beautiful Wife," he wrote on Instagram beside a gorgeous photo from the Broad Museum. "You're my best friend and I'm so thankful for you, sometimes I just want to tell the world. Generous, Kind, Compassionate, Selfless, Humble, Thoughtful, Patient and Loyal. Just a few of the qualities I would use to describe who you are, consistently, everyday. Thanks for being you, I'm a lucky guy. "

He continued with several heart emojis, "Here's to many more. I love you."