Kevin Mazur / BMA2015 / GettyImages.com 1 / 8
Kevin Mazur / BMA2015 / GettyImages.com 1 / 8

Calvin Harris unloaded on his ex-girlfriend Taylor Swift on Wednesday, while also admitting that she secretly wrote one of his monster hits under a fake name.

On Wednesday, reports surfaced that Taylor actually wrote Calvin's song "This Is What You Came For" under the name Nils Sjoberg and actually owns the rights to the song.

Calvin retweeted a report about the remarkable story, adding, "And she sings on a little bit of it too. Amazing lyric writer and she smashed it as usual."

He then continued, "I wrote the music, produced the song, arranged it and cut the vocals though. And initially she wanted it kept secret, hence the pseudonym."

Eventually, though, his remarks got personal and he even accused Taylor of trying to "bury" him, claiming she tried to ruin her sworn enemy Katy Perry, too.

"Hurtful to me at this point that her and her team would go so far out of their way to try and make ME look bad at this stage though," he wrote, using an emoji indicating he's thinking about something. "I figure if you're happy in your new relationship you should focus on that instead of trying to tear your ex bf down for something to do."

In his multiple tweets, Calvin all but alleges that Taylor is bored and her new hobby is trying to destroy his career.

"I know you're off tour and you need someone new to try and bury like Katy ETC but I'm not that guy, sorry. I won't allow it," he wrote. "Please focus on the positive aspects of YOUR life because you've earned a great one."

He finished his multi-part tweet by saying, "God bless everyone have a beautiful day."

According to an earlier report, the song became a turning point in the Taylor romance with Calvin, especially after he gave an interview and said they two were never going to work together.

"You know we haven't even spoken about it. I can't see it happening though," he told Ryan Seacrest on the day that his new song was released.

Despite their decision about what to tell the public, Taylor, who is now dating Tom Hiddleston, reportedly thought negating the possibility of a collaboration was hurtful, disrespectful and she believed her then-boyfriend "took it too far."