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After nude pics of R&B superstar Rihanna hit the Net with a venegence earlier this month, her “allegedly” abusive ex, crooner Chris Brown, denied any involvement in the leak. But Ri-Ri ain’t buying it – and the “Umbrella” hitmaker is threatening to release several saucy snaps of Chris in retaliation.

She even threatened to go “Left Eye” on his ass: “She was saying crazy things like, ‘I’m going to burn down his house,'” a friend of the 21-year-old tells the June 7 issue of Star of Rihanna’s reaction to finding nude images of herself plastered all over the Internet.

According to pals, once she calmed down, the singer began plotting her revenge against the man accused of beating her senseless.

`”She says she’s going to release her own photos of Chris. She has less-than-flattering nude pics of him that she plans on leaking. Rihanna says he’ll be really embarrassed,” whispers one in-house informant.

The diva is also planning to plant several humiliating stories about Chris’ sexual performance – or lack thereof – in a bid to leave her 20-year-old former flame shamefaced. Rihanna is already chuckling to friends that Chris was a clumsy novice at lovemaking until “she taught him everything he knows.”

“She’s going to ruin his sexy image.”

This week, it was revealed that Rihanna will testify against Chris Brown in a preliminary hearing last month stemming from felony charges that he assaulted her during a fight in Los Angeles last February.