Calvin Harris fails to thank ex Taylor Swift after winning VMA for song she secretly helped write

From Beyonce to Kanye West and Taylor Swift - What to Expect (and Not Expect) at the MTV VMAs

Well, this is awkward!

Calvin Harris took home the Moonman at the MTV Video Music Awards for Best Male Video for the mainstream hit "This Is What You Came For," which features vocals by Rihanna and was secretly co-written by his ex-girlfriend Taylor Swift.

Harris, who was a no-show at Sunday's awards show, taped a thank-you message that was played for the Madison Square Garden crowd.

RELATED: Taylor Swift Secretly Wrote Ex Calvin Harris Song 'This Is What We Came For'

"Wow, wow! First of all, I'm so sorry I can't be there. I have a show tonight in the U.K. otherwise I would definitely be there. MTV, this is crazy," the 32-year-old Scottish DJ-music producer began his video message, before thanking RiRi. "I need to thank Rihanna from the bottom of my heart. You're a superstar. Every time we work together you bring something so magical to the project, so thank you."

See photos of Calvin Harris and Taylor Swift together:

Taylor Swift Calvin Harris
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Taylor Swift Calvin Harris
Friendly relations between Scotland and America. @calvinharris
Little known fact: Karlie is secretly an unofficial historian/London tour guide. Kind of.
NEW YORK, NY - MAY 28: Taylor Swift,Calvin Harris are seen in Tribeca on May 28, 2015 in New York City. (Photo by Alo Ceballos/GC Images)
LAS VEGAS, NV - MAY 17: Recording artists Taylor Swift (L) and Calvin Harris attend the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Kevin Mazur/BMA2015/WireImage)
LAS VEGAS, NV - MAY 17: Recording artist Taylor Swift embraces DJ/producer Calvin Harris after she won the Top Billboard 200 Album award during the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

Harris also took a moment to single out music video director Emil Nava for his creative vision, but avoided any mention of Swift, who co-wrote the song under the pen name Nils Sjoberg. In July, Swift's rep confirmed to ET that she had contributed both writing and vocals to the track.

"And everybody who supported this song, who watched this video, I love you so much. Thank you, this is amazing. I love you. Thank you MTV!" he ended his message.

RELATED: Shirtless Calvin Harris Celebrates VMA Nominations for the Song Taylor Swift Wrote

ET was on the scene at the VMAs, and following Harris' win, boos were heard from the audience, though it wasn't clear if it was because he skipped the awards show or didn't give Swift recognition for her creative involvement with the song.

Fans took to Twitter to react to Harris' presumed shade at the 26-year-old singer.

RELATED: 11 Times the MTV VMAs Was the Shadiest Awards Show Ever

Harris and Swift, who is now dating British actor Tom Hiddleston,broke up in June after one year of dating.

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