Selena Gomez and Demi Lovato's friendship has recently been the center of attention on social media.

After purportedly "growing apart" recently, Selena Gomez tweeted Demi Lovato to greet her a happy birhday.

"@ddlovato IM so grateful you were born. #nomatterwhat #forever #haveTHEbestbday," Selena Gomez tweeted, as quoted by Seventeen Magazine.

Demi Lovato returned the love and tweeted: "@selenagomez I'm so glad you were born too... :P #forever #nomatterwhat."

Demi and Selena's fans were elated over seeing that the two have patched things up and have returned to being besties.

However, one person is purportedly not happy with Selena Gomez and Demi Lovato's rekindled friendship - Taylor Swift.

A person close to Taylor Swift's group of friends reportedly dished out on the "Blank Space" singer's friendship with Selena Gomez.

"Taylor wants to be everyone's BFF, and she freaks out if she is not the most important person in each of her friends' lives," a source reportedly told Celeb Dirty Laundry.

"She won't ever confront them though, when Taylor is mad at you - you will know. She goes out of her way to exclude you from group hangouts, and usually does something petty like befriending someone you don't get along with."

Before Selena Gomez' falling out and reunion with Demi Lovato, it has been previously reported that the "Good For You" singer got into a fight with Taylor Swift because of "You Belong With Me."

Apparently, Taylor Swift's disapproval of Justi Bieber has caused a rift in her friendship with Selena Gomez.

"Taylor Swift and Selena Gomez have a bizarre relationship," Celeb Dirty Laundry wrote. "Remember when Selena was hanging out with the Jenner sisters and Taylor cut her off. Or what about the year that Taylor wouldn't even speak to her because she was dating Justin Bieber?

"Their friendship resembles a horrible Lifetime movie about fatal attraction. Taylor seems to want Selena all to herself, or not at all."