'Haylor' Happening: Harry Styles and Taylor Swift Part of iHeartRadio Music Festival

A "Haylor" reunion just might happen. News has it that Taylor Swift and One Direction are set to perform at the upcoming iHeartRadio Music Festival. Taylor and 1D will head the line up along with a few other stars like Ariana Grande, Iggy Azalea and Lorde.

The iHeartRadio Music Festival is all set for Sept. 19 to 20 at the Las Vegas MGM Grand Hotel & Casino. A number of performers have already been roped in to hit the stage. Nicki Minaj, Taylor Swift, One Direction, Iggy Azalea and Ariana Grande are just a few stars.

With Harry Styles of One Direction and Taylor Swift part of the performances, this could only mean a "Haylor" reunion. The big question is will this reunion be as bad as it was during the 2013 MTV Video Music Awards?

Fans of Swift and Styles may recall that during the 2013 VMA's, things weren't as friendly between the two singers. During Swift's acceptance speech for winning Best Female Video, Taylor took a dig at Styles.

"I want to thank the fans because I tweeted about this a lot, I really wanted this," stated Swift to which she quickly added, "I also want to thank the person who inspired this song because he knows exactly who he is, because now I've got one of these."

With Swift's speech, fans were quick to assume the former "Haylor" couple wouldn't be seen getting friendly after the awards. Yet, Ed Sheeran surprised a number of fans when he posted a selfie of him sandwiched between Harry Styles and Taylor Swift.

Of course, a photo of Harry and Taylor together wouldn't prove things are once again good between the two. Fans will just have to wait until the iHeartRadio Music Festival and see how smoothly things go between the former "Haylor" couple.

Check out the official line up of performers below:

Usher
Ariana Grande
Coldplay
Nicki Minaj
Zac Brown Band
Ed Sheeran
Motley Crue
Paramore
Iggy Azalea
Train
Eric Church
Lorde
Calvin Harris
Bastille
Steve Aoki