(Radio.com) Calvin Harris took to social media on Wednesday (July 13) to vent about his ex girlfriend Taylor Swift. Harris tweeted a story from People, which reported Swift wrote the lyrics for Harris' current single with Rihanna "This Is What You Came For," under the pseudonym Nils Sjoberg.

"And she sings on a little bit of it too," he added. "Amazing lyric writer and she smashed it as usual." "I wrote the music, produced the song, arranged it and cut the vocals though," he elaborated. "And initially she wanted it kept secret, hence the pseudonym."

Then things take a bit of a dark turn. "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 writes. "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."

Harris' then appears to bring up Swift's alleged rivalry. "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."

And finally. "Please focus on the positive aspects of YOUR life because you've earned a great one. God bless everyone have a beautiful day." See all of Calvin's tweets here.