Miley Cyrus: Liam Hemsworth cheating may have been the reason the former Disney star ended her engagement of over one year to the Australian actor. She allegedly was hearing several reports that Hemsworth was cheating on her.

According to Page Six, Hemsworth was flirting with Mexican actress Eiza Gonzalez while on a trip in Las Vegas and Cyrus heard about it.

It was also reported by Page Six that the Wrecking Ball singer's ex was making out with a brunette in Canada last month, before their breakup.

Last February, the ex Hannah Montana star heard reports that Hemsworth was flirting at an after-party during Oscar's night with January Jones.

E! Online also stated, "Miley's decision, after coming to grips with Liam being what she believed, was less than faithful to her."

The We Can't Stop performer made it publicly known that her and Hemsworth were over when she unfollowed her fellow Last Song actor on Twitter.

A source close to Miley told HollywoodLife.com, "She unfollowed him to send him a message that she's serious about being done this time. They've had fights before but they've always kept it secret, so it's been easy to go back and forth. Making it public takes it to a whole new level."

Cyrus used to date a model by the name of Justin Gaston. She started dating the Australian hunk Hemsworth shortly afterwards.

She once told Parade Magazine that Hemsworth was her "first serious boyfriend."

After three years of dating, Cyrus and Hemsworth got engaged, according to their representatives and PEOPLE.

Cyrus once told PEOPLE, "I'm so happy to be engaged and look forward to a life of happiness with Liam."