Rihanna on a yacht in Portofino, Italy. (August 24, 2011)

*On vacay in Portofino, Italy, Rihanna took time out of her yachting and lounging to squash Internet rumors that she filmed a sex tape with rapper J. Cole.

The pop star responded to the reports via Twitter, writing:  “We don’t believe U, U need more people…AND of course an actual sextape! #slownewsday”

For his part, J. Cole also denied the rumors, tweeting: “Gossip Gossip, n*gga just stop it.”

Hustler set the rumors in motion yesterday (Aug 24) by confirming to E! News that they had the sex tape and were deciding on how to release it. The company said, “We have not made any decisions about what we are going to do with it yet.”

J. Cole, opened for RiRi on her recent Loud tour.

Below, more photos of the singer on vacation in Italy.

Singer Rihanna is seen at a restaurant spending time with girlfriends in Italy

Rihanna stops for an Italian gelato as she continues her holiday in Portofino, Italy

Rihanna enjoys some quality retail therapy at the Louis Vuitton store in Portofino, Italy