Rihanna's Pacific Palisades home

Rihanna’s Pacific Palisades home

*Once again, someone has trespassed onto Rihanna’s Pacific Palisades mansion.

While the singer was in Australia on tour, an intruder drove up the private road to her $12 million property, walked to the backyard and threw a chair through a sliding glass door, law enforcement sources tell TMZ.

The would-be burglars were scared off, apparently by the alarm, because they left without entering.

…But not before their image was captured. Rihanna’s house is covered by surveillance cameras. In fact, the private road leading to her property has a sign that reads: “Smile, You’re on camera”

Cops are still on the hunt for the intruders.

It’s not the first problem Rihanna has had with unwanted visitors. In February a stalker tried to break into her house but mistakenly entered her neighbor’s pad. Also, in June, another man was busted by her security team, after they spotted him creeping on her roof.