Miley Cyrus on mission to humiliate Hemsworth

Melbourne: Miley Cyrus is "trying to humiliate" Liam Hemsworth before taking him back, according to reports.

The pair have been beset by problems over the last few weeks and Cyrus is said to be putting her rumoured ex-fiance through "hell right now," News AU reported.

The young stars got engaged in June 2012 but speculation is rife that they have broken up amid claims that Hemsworth, 23, has struggled to cope with his 20-year-old fiancee's image overhaul, which has seen her bleach her hair blonde and shave most of it off.

The "Can't Be Tamed" singer is allegedly trying to make Hemsworth feel bad for trying to control her image and who she spends her time with.

There is also reports that Hemsworth was caught in a clinch with 'Mad Men' star January Jones, while Cyrus was recently spotted without her engagement rings.

Hemsworth is spending time in his native Australia at the moment and according to New York Post, the pair are no longer in a relationship.

"Miley and Liam are done; it's over. She likes to party really hard and can be pretty wild. It became a problem for him," an insider told the publication.