Britney Spears turns 40: Fiancé pays tribute as star marks first birthday as a free woman in 13 years

Britney Spears turned the big 4-0 on Thursday – and her fiancé was first to leave a heartfelt message to mark her first year as a free woman in 13-years.

Sam Asghari took to Instagram with two adorable snaps of the pair aboard a private jet, captioned: “I call you Lioness because I admire your relentless strength, I’m inspired by your beautiful heart, I celebrate your smile that lights up my world. Everyday is your birthday my queen. Happy 1st birthday to my wife.”

The 27-year-old actor was equipped with a rose-themed cake, flowers and a rendition of happy birthday which he shared to his Instagram story. “Oh my God”, the singer reacted.

He later showcased a firework display from their celebratory vacation.

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“Oh the precious joy today !!!,” Spears said on Wednesday. “Me and my fiancé are so excited to be going away …. as you can see I’m not 800 pounds like the paps have me in pics… I’ve been working out and it’s real … whatever!!!! God thank you for being able to go out of the country !!!! I am blessed !!!!”

Fans of the Gimme More singer also inundated Twitter with messages to mark her milestone.

One said: “Happy 40th Birthday to the strongest woman in the WORLD. Your first birthday of freedom in such a long time. You’ve inspired millions with your music, and now you’ve inspired millions with your story.”

Another added: “Happy 40th birthday to the living legend Britney Spears! You are an inspiration to all of us, enjoy your birthday as a FREE woman queen!”

Even the popular streaming service, Spotify, jumped online to wish Spears a happy birthday.

The star has slowly started adjusting to her newfound freedom. Earlier this year, Judge Brenda Penny terminated her conservatorship, which allowed her father, Jamie Spears, to control her financial and personal decisions for 13-years.