Miley Cyrus 'Cheating' on Liam Hemsworth? 'We Can't Stop' Twerk Starlet Spotted 'Kissing' Guy Friend, 'Out of Control' Partying with MTV's Rob Dyrdek?

As if Miley Cyrus' infamous "Blurred Lines" performance at the 2013 VMAs wasn't enough, now seedy rumors suggest that the "We Can't Stop" twerk queen is cheating on her "Hunger Games" fiance, Liam Hemsworth! Apparently, the 20-year-old songstress was spotted kissing one of her guy friends while partying with MTV's Rob Dyrdek in NYC back in August. Really, Miley!

In Touch reports that Cyrus got a little too crazy while partying at NYC's 1Oak nightclub over the VMAs weekend. "She was pretty out of control," one eyewitness claims.

So out of control that she ended up making-out with one of her close dude friends (still no name).

Rumors surrounding Cyrus' "inevitable" break up with Hemsworth have been swirling online for months now - so who knows how legit such "cheating" claims are. But given Cyrus' rather wild behavior lately, anything is possible.

Apparently, the couple got into a "huge" fight before Cyrus' raunchy performance alongside Robin Thicke at the VMAs. They haven't been talking much since.

Is this officially the end of their long-term relationship - or just some more shady nonsense?