As noted on many occasions, Taylor Swift has many famous friends.
But the superstar singer has one best friend that ranks above all the others... and today is her birthday!
"Happy 23rd Birthday, @selenagomez. I can't believe it's been 7 years since we met!! I love you so much, always," Swift wrote as a message to her pal on Twitter today, including with it the following photo montage:
And Swift wasn't the only celebrity to send positive thoughts Selena's way on the occasion of her birth.
"Happy birthday my sweet angel. It's been so fun watching you grow up over the years," wrote Pretty Little Liars actress Ashley Benson. "Love you always @selenagomez."
Gomez, meanwhile, was the one who offered fans a present yesterday, revealing the title and the release date of her next studio album.
It will be called "Revival" and it will come out on October 9.
"I am the luckiest, happiest girl today," Gomez captioned her own Instagram photo on Wednesday.
"Thank you guys so much for all the bday wishes!! I love growing up with YOU."