There have been rumours of the former sweethearts pairing up again for years, but it seems that the long awaited duet between Britney Spears and Justin Timberlake is finally back on.

The pair - who dated in their teens and split in 2002 - will be teaming up for a song on the Toxic singer's next album, which is due at the end of the year.

'They’re planning to record a duet – a dance track – for her new album,’ a source close to the singer reportedly told Life & Style magazine.

Britney will be teaming up with former flame Justin Timberlake for a track which will be on her new album

Justin and Britney have had little contact since their split six years ago, but the
27-year-old is said to be willing to put the past aside in order to help his former love.

‘He’s been sent her new music, and his feedback is really positive,’ an insider said to be close to the star is quoted as saying.

The former couple were supposed to team up for her last album, but troubled Spears missed her recording session with legendary producer Timbaland at his Virginia Beach studio last August.

She is also thought to have avoided seeing Justin at the VMA’s in 2007 when he attempted to wished her good luck before her disastrous performance.

Back to her best: A slim Britney in Las Vegas this week

But the mother-of-two is now said to be keen to show her ex  that she has changed.
She’s strong again – and she wants Justin to see that. Musically she wants to blow him away,’ the source added.

However it seems unlikely that the pair will reignite their relationship.

Justin is currently dating actress Jessica Biel and reportedly 'only wants friendship from Britney.'

Childhood sweethearts: Britney and Justin dated in their teens but split in 2002

Britney is currently recording for the album and recently described it as her 'best work ever'.

"I think it is more urban. I'm working with producers who are just amazing," she told OK magazine.

She said that she had written most of the material and was spending time at the piano every day working on new songs.