Awww, how sweet.
Taylor Swift made sure to wish her BFF Selena Gomez a happy birthday on July 22, posting a photo of the pair at what looks to be her Rhode Island home.
Happy 21st birthday to my friend, and the closest thing I've ever had to a sister, @selenagomez!! pic.twitter.com/GhOgkl3kZ1
— Taylor Swift (@taylorswift13) July 22, 2013
The pals posed as mermaids -- well, technically they replicated a mermaid statue -- while sitting on the ledge of Swift's yard in Watch Hill.
“I met [Swift] when she was 18. This is before [Swift's 2008 album] Fearless came out, and it was absolutely incredible to see someone so successful and so humble," Gomez told People earlier this year. "I think she has been a big part of me kind of staying the way I am too."