The singer celebrated her 40th birthday Thursday in Cabo San Lucas, Mexico, with her fiancé Sam Asgari.
"She was fortunate to be with him for her 40th birthday. It's the perfect time to get rid of custody. She feels pleased in every way," insiders report.
Spears's trip to Mexico was a turning point, as she left the U.S. for the first time in 13 years - after being freed from her father's decades-long custody last month. Britney shared a photo and video of her and her lover posing near their private jet on social media. The video is at the link.
"Oh, I'm so happy!!! God, thank you for allowing me to leave the country! I'm blessed," she wrote on Instagram.