Miley Cyrus and Liam Hemsworth are allegedly "on a break" and are expected to cancel their upcoming wedding, HollywoodLife.com reports, leaving fans wondering if her raunchy twerk video and VMA performance led to the feud.

"Miley and Liam have a very tumultuous relationship and are both exhausted," a source told Radar Online. "They've split for now."

Liam Hemsworth also made headlines for his reaction to his fiancé's performance at this year's VMAs.

Miley Cyrus revealed in an interview with Entertainment Weekly that the expression on her eyes in the music video of her new hit track "Wrecking Ball" were more depressing than her lyrics.

"If people can take their minds off the obvious and go into their imagination and see what the video really means, it is so vulnerable. ... If you look at my eyes, I look more sad than actually my voice sounds on the record. It was a lot harder to actually do the video than it was to even record the song. It was much more of an emotional experience," she told Entertainment Tonight.

"I think the video is much more," she said. "If people get past the point I make, and you actually look at me, you can tell I look more broken than even the song sounds."