WENN

Britney Spears took to social media to mark 20 years since the release of her second album Oops!… I Did It Again on Saturday.

The album held a 15-year-record for the biggest U.S. sales week ever for a female artist, and sold over 1,319,000 copies in the first week alone. The only album to beat the figure since is Adele’s 2015 album 25.

Taking to Instagram, Britney posted a video of its title track along with various promotional interviews she did when releasing the album.

“Thank you to whoever made this ….. I just nearly dropped my phone I wasn’t expecting it,” she wrote in a caption, suggesting the clips were put together by a fan. “20 years since the Oops! album … the anticipation and the butterflies I felt before it came out were crazy … all of my expectations were exceeded!!!!”

The Stronger hitmaker added: “And it’s all thanks to you folks …. thank you for sticking with me and growing with me … I am one Lucky girl. God Bless and thank you all !!!!!! PS you see even 20 years ago I still liked to twirl!!!!”

In March, the singer also marked the anniversary of the record’s title track, gushing: “Oops!….how did 20 years go by so fast?!??! I can’t believe it.

“I remember that red suit was so freaking hot …but the dance was fun and it made the shoot fly by !!!!!”