While many assumed that Calvin Harris would escort his lady love, the "I Knew You were Trouble" songstress arrived at the 2015 Billboard Music Awards with her girl posse. Taylor Swift's "Bad Blood" music video made its debut in the star-studded event.

The 25-year-old hit maker donned a white Balmain pantsuit complete with a plunging neckline. She completed her look with a "Bad Blood" clutch as well as a pair of shoes from Brian Atwood. While her beau didn't escort her, Calvin Harris reportedly sat two seats away from her.

The blonde beauty allegedly asked the organizers to rearrange the seating plan so that the press wouldn't focus on her and Calvin Harris.

As per Us magazine, prior to introducing Van Halen, Taylor Swift made a short remark about the debut of her music video saying, "Welcome to the Billboard Music Awards 2015. I'm so excited I got to show the world my whole new music video for 'Bad Blood.'"

Taylor Swift's "Bad Blood" music video is certainly filled with stars. Several celebrities who made an appearance in the music video included Lena Dunham, Ellie Goulding, Hayley Williams, Gigi Hadid, Mariska Hargutay, Ellen Pompeo, Zendaya Coleman, and Jessica Alba.

Apart from Cara Delevingne, Victoria's Secret models Karlie Kloss, Lily Aldridge, and Martha Hunt were also featured in the said music video.

Selena Gomez also played the role of an archenemy. Kendrick Lamar, on the other hand, added some verses to the "Bad Blood" remix.

Taylor Swift's "Bad Blood" music video was once rumored to be about Katy Perry.

In an interview with Rolling Stone magazine, Taylor Swift talked about what fuelled her to write the song.

"It had to do with business. She basically tried to sabotage an entire arena tour. She tried to hire a bunch of people out from under me. And I'm surprisingly non-confrontational - you would not believe how much I hate conflict. So now I have to avoid her. It's awkward, and I don't like it."