Craig David and Usher to collaborate?

Craig David and Usher are in talks about collaborating on a new song.

The '7 Days' hitmaker joined the music superstar on stage during his 'Past, Present and Future' residency at London's O2 Arena earlier this month and the pair are now said to be planning to drop a new track together.

A source told The Sun newspaper's Bizarre column: "Usher and Craig have always had a huge amount of time for each other and there is a lot of respect between them.

"After Usher had Craig up on stage with him at the O2 earlier this month, they then talked about working together on a new song.

"Now they have asked their writers to come up with some ideas.

"Usher has been quietly putting together a new record and maybe Craig could be a featured artist if they can find the right song."

The 'OMG' singer paid tribute to Craig when the pair were together on stage recently as they duetted on the latter's tracks 'Fill Me In' and '7 Days'.

The 46-year-old star said: "Every time we've ever met it's been positive, every chance we get to celebrate each other, we have.

"I've learnt a lot from my audience to your audience."