The Billboard Music Awards 2015 was awkward enough for exes Taylor Swift and Harry Styles, but his One Direction bandmates Niall Horan and Louis Tomlimson just add fuel to the fire by posing with the "Blank Space" singer and her new boyfriend, Calvin Harris.

Harry Styles reportedly skipped the Billboard Music Awards 2015 after-party hosted by Taylor Swift in Las Vegas last week.

"The chart-topper was seemingly absent from the 25 year-old's bash, where she was joined by new boyfriend Calvin Harris, BFF Ed Sheeran - not to mention 1'D Niall Horan and Louis Tomlinson," Daily Mail said.

"A personal picture of the gang emerged on social networking on Monday, showing the five stars getting cozy in a photobooth."

The British publication said that there was a "Harry-shaped void" in the selfie that Niall Horan and Louis Tomlimson took with Taylor Swift and boyfriend Calvin Harris.

Although Taylor Swift has been linked with several men, the hitmaker-a huge winner at the Billboard Music Awards 2015-Harry Styles was the only one she admitted to dating, apart from Connor Kennedy who she dated in senior high.

The "Blank Space" singer has been accused of breaking up with boys and slamming them in her hit songs.

But she told Vanity Fair back in April 2013 that she was never the "clingy, insane, desperate girlfriend" that she was portrayed to be."

"I think that's taking something that potentially should be celebrated -- a woman writing about her feelings in a confessional way --that's taking it and turning it and twisting it into something that is frankly a little sexist," she said.

Taylor Swift reportedly hooked up with Calvin Harris during the Brit Awards and dates soon after. However, they only made their relationship public by appearing in the Billboard Music Awards 2015 together.