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Was it the twerking that did them in?

Or the texting?

Miley Cyrus, 20, and Liam Hemsworth, 23, have ended their relationship and called off their engagement, reps for both stars have confirmed for USA TODAY.

The buzz has long been brewing, but now it's official.

E! Newsreports that the split was "Miley's decision, after coming to grips with Liam being what she believed was less than faithful to her."

People.comsays the two have been "living separate lives."

The couple - who met on the movie set of 2010'sThe Last Song- got engaged in May 2012. But there has been buzz for months that the relationship was on the rocks. In April, rumors surfaced that the wedding had been postponed.

Over the weekend, hewas spottedat the Floyd Mayweather-Canelo Alvarez super welterweight title fight in Las Vegas, while she was busyunfollowinghim on Twitter.

All of it comes amid anUs Weeklyreport that Hemsworth was texting January Jones, with whom he had been linked at anOscar partyin March. His rep called that report a "fabrication."

Meanwhile,Life & Stylehas a new story linking him to Mexican actress and singer Eiza Gonzalez on Sunday night at a Vegas nightclub.

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