By Staff Writer (media@latinospost.com) | First Posted: Jul 23, 2014 09:25 AM EDT

Last year, Taylor Swift reportedly rejected BFF Selena Gomez's birthday invite "because she knew JB would be there," Perez Hilton said. And by JB, you know it refers to Justin Bieber.

"Taylor isn't mad that Selena's party was in LA. Taylor has been busy and will celebrate with Selena sooner than later and has contacted her to wish her a Happy Birthday, but she would have avoided going to the party because she would know Justin was there and she isn't a super partier," a source told the celebrity blogger. "She is actually happy that she was busy so she had an excuse to avoid the hoopla herself as she would avoid the drinking and the carrying on."

That was not the only time Tay made it felt that she wasn't jumping with joy over Sel's relationship with the troubled pop star. According to insiders, the country music superstar allegedly gave her friend an "ultimatum," making her choose between her or Biebs. Apparently, at the time, the birthday girl chose the boy. Cue Tay-Sel rift.

However, it appears that the ladies have mended their friendship as the "Red" artist had recently extended her birthday greetings to the "Come and Get It" singer, albeit via social media.

"Taylor Swift put aside any differences she may have had with Selena Gomez on Tuesday as she wished her fellow pop star a happy birthday," The Daily Mail noted. "Taylor, 24, posted a selfie to Instagram as she dangled a large 'S' medallion in front of her face with a message celebrating Selena."

"Usually this S represents 'Swift' but today I'm wearing it because SELENA IS 22!!!!" her Instagram caption read.

Fans and entertainment observers note that this greeting could be taken as a sign that the once estranged BFFs have reconciled, as what Hollywood Life also observed.

"Taylor and Selena have been friends for years, but after Selena's always up and down relationship with Justin Beiber took a turn for the worse once again, Taylor needed a break," the site said. "However, when Selena went back to Taylor again this summer, she called it quits - but apparently it wasn't permanent. We are so glad to see these two back in action and friends again."

And so are the fans of both stars.

Recently, Sel has been spotted cruising with new pal, supermodel Cara Delevingne, in St. Tropez, where she spent her birthday.

"No word yet how Gomez plans to spend the rest of her day, but if her recent outings are any indication, she'll definitely be celebrating in style," E! News said.

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