Britney Spears celebrates her 43rd birthday while jet setting!

On Monday, December 2, the global pop star planned an international celebration for her big day.

“Britney treated herself to a lovely holiday for her birthday. She loves Mexico and can’t wait to party in the sun,” a source tells PEOPLE.

The source tells PEOPLE that Spears “flew to Mexico with friends” on a private jet.

Earlier in the day, Spears revealed that she kicked off the pre-dinner festivities with “red lips and delicious wine.” Hours later, she posted an Instagram carousel showing a “very cute baby baby cake” topped with strawberries and covered in a chocolate lattice.

The “Gimmie More” singer has partied in Mexico in the past. In 2021, she celebrated her 40th birthday in Cabo San Lucas, Mexico with her then-fiancé Sam Asghari.

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“I am so blessed and grateful!!!! Tears of joy today,” she captioned an Instagram post at the time, adding a crying emoji. “Thank you for all the birthday wishes 🥳🎂🎈🎉!!!! Psss, I didn’t even drink the champagne 🥂 no lie!!!!”

According to documents obtained by PEOPLE, Spears was declared legally single on Monday, seven months after her divorce was finalized in Los Angeles on May 2.

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In November, the “Overprotected” singer reunited with her youngest son Jayden, 18, whom she shares with ex-husband Kevin Federline. She and Federline, who went their separate ways in 2006, are also parents to 19-year-old son Sean Preston.

“Spending time together made her happy,” a source told PEOPLE of the Grammy winner and Jayden’s friendship at their Los Angeles home.