Jessie J wrote song for Aguilera, Keys

Jessie J has said she wrote a song that was recorded by Christina Aguilera, Alicia Keys and Mary J Blige but never released.

The singer told RWD magazine: 'The story will be told one day. It went from Mary J Blige to Christina Aguilera to Alicia Keys but I've got it back again now.'

Jessie also said that despite writing 'Party In The USA' for Miley Cyrus, the experience wasn't very collaborative.

'I've never met her, that's what people don't realise,' she said. 'You know what's more weird though, is that you're not actually there when they record (the song). I record 'Party In The USA', played it for the label but they didn't think it was right for me. So they pitched it and two weeks later it was number one in six countries.'