“Justin was very clear with Jessica that he didn’t want to be in a serious relationship with her anymore where he wasn’t able to date other people,” says the insider. “Jessica took the news very hard, but once she calmed down and they started talking again, he convinced her to stay friends who hook up, without all the pressure of a relationship.”

“At first she was very reluctant, but she missed him a lot and so she decided to give it a try even though it wasn’t exactly how she wanted things to be,” the source explains. “She’s still in love with him, and they are still attracted to each other, so it would have been difficult for them to quit each other cold turkey.”

“Justin gets the best of both worlds,” says the source. “He doesn’t have to lose Jess as a lover or a friend, but he’s free to explore other [relationships].”

‘He is really into her’, the insider alleged.

The source claims Timberlake, 28, and the Umbrella star, 21, have been meeting together in New York.

It is not the first time the pair have enjoyed time together after JT helped out the Barbadian beauty in a raunchy video shoot during her third album Good Girl, Gone Bad.

Timberlake is also lending his skills to the star’s next record, which could be a good reason for the sightings.

Only this week he spoke about their time in the studio together telling: ‘The stuff we’ve come up with in the studio, it’s the next step for her. It’s a little more grown-up. It’s got some edge to it.’

But the mole also alleges playful Rihanna recently gave Timberlake a lap dance at the 10ak night spot in NYC.

The claims come after Timberlake was accused by Lindsay Lohan of being a ‘cheater’ on Twitter after he was spotted dancing on a bar table with a mystery woman earlier this year.

He also put in a lip-lock photo opportunity with Biel, 27, at a basket ball game after he was accused of ‘acting like a single guy’ at a party thrown by ex Kate Hudson.

A spokeswoman for Rihanna would not comment on her personal life and Justin Timberlake’s representatives did not return our emails.

“IFPI is working with SyCo and law enforcement agencies in the U.S. and Europe to trace the individuals who stole the Leona Lewis/Justin Timberlake track,” said Jeremy Banks, head of IFPI’s Internet Anti-Piracy Unit.

“The police investigation is ongoing,” he said in a statement. “Such pre-release leaks, however they are sourced, are highly damaging to our members who invest considerable budgets in marketing and promoting music ahead of release.”