Happy birthday, Britney Spears!

The pop princess turned 39 on Wednesday (Dec. 2), though she took to Instagram a day earlier to give herself a sweet birthday wish. “Happy b-day to me,” she wrote alongside a photo of her smiling with boyfriend Sam Asghari, with a slew of cake, confetti, star, flower, shoes and fashion emojis.

“Happy birthday gorgeous! Love you,” Mariah Carey commented on the post.

Asghari celebrated his girlfriend by sharing a hilarious video of Spears singing happy birthday to herself, plus a sunflower-decorated cake. “Happy Birthday to my Lioness,” he wrote. we’ve been celebration [sic] we will celebrate until the end of the year let the cake eating began……”

Beyoncé, Lionel Richie and other stars also shared sweet messages for the superstar. See below.