Melbourne, June 16 A sex tape reportedly featuring Rihanna has been leaked online.

According to various celebrity gossip and music websites, the clip in question has been modified to give a "night vision" green-filter feel similar to Paris Hilton's famous sex tape, reports the Daily Telegraph.

It goes for 13 seconds and shows a woman who looks like a version of the 'Umbrella' singer from a couple of years ago.

The man in the video is not visible, so it's impossible to say whether or not it's her ex-boyfriend Chris Brown.

Rumours of a sex tape between the couple have been making rounds for the last few months.

The maker of the video has promised to release more footage on June 22.

The news of an alleged tape comes after naked pics photos of her surfaced online, which were allegedly leaked by Brown.

Brown has dismissed reports that he's involved in the nude photo leak, but sources close to Rihanna have said she is planning a revenge attack on her ex-beau by releasing compromising photos of him.

Rihanna triggered a tsunami of interest following her altercation with then boyfriend Chris Brown earlier this year, where Brown was alleged to have assaulted her after a pre-Grammy Awards party.

Rihanna will testify against Brown when he appears in court over his alleged bashing of her several months ago. (ANI)