Is there bad blood again between Taylor Swift and Kanye West?

The controversial rapper, who performed the song “Famous” from his upcoming album “The Life of Pablo” at Madison Square Garden Thursday, had the Twitterverse in a frenzy thanks to one line in the song which made reference to the pop diva. “I feel like me and Taylor might still have sex / I made that [expletive] famous.”

This marks the latest incident in the strange history between the two performers, which began when West interrupted her at the 2009 MTV Video Music Awards. She later wrote a song about the incident, and they reconciled in public last year.

It’s still unclear whether Swift had signed off on the song. According to TMZ, Swift had seen the lyrics and had approved them. However, a spokesperson for the singer gave a statement to The New York Times’ music critic Jon Caramanica claiming that Swift was not happy about West’s song. Meanwhile, West has been tweeting incessantly in defense of the song.

“I did not diss Taylor Swift and I’ve never dissed her,” West tweeted. “First thing is I’m an artist and as an artist I will express how I feel with no censorship. . . . 2nd thing I asked my wife for her blessings and she was cool with it. . . . 3rd thing I called Taylor and had a hour long convo with her about the line and she thought it was funny and gave her blessings.”

He also described his misogynistic reference to Swift as a hip-hop term of endearment and claimed the line was her idea.

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Swift has not responded, though model Gigi Hadid, a member of Swift’s squad who attended West’s event, tweeted support for her friend. “My attendance somewhere does not mean I agree with everything being said in the music playing there. My friends know of my loyalty,” she wrote.

Meanwhile, West’s album, which was supposed to drop Friday, Feb. 12, was delayed. According to reports, Martin Shkreli, a former pharmaceutical CEO who made headlines last year for raising the prices of a drug taken by HIV patients, is offering West and his record company $10 million for the new album.

West tweeted Friday morning about “The Life of Pablo”: “The album is being mastered and will be out today… added on a couple of tracks…”