Friday, December 2, is practically a holiday to Britney Spears fans!

The pop star celebrated her birthday and turned 41!

Many fans and famous friends took to social media to wish her a happy birthday.

One of her famous friends was Paris Hilton, who shared two throwback photos of the two together.

“So many magical memories with you after over two decades of friendship!” Paris wrote.

She thanked Britney “for being such an incredible friend.”

Paris also praised Britney’s “beautiful soul.”

“You deserve all the happiness in the world!” she added.

Plenty of fans loved to see “queens supporting queens!”