Rihanna was attending a party on Friday night after her performance of X Factor when the DJ must of had what one can guess is temporary memory loss and played a Chris Brown song.

Cash Money records paid alot of money to make sure that Rihanna would attend the party as the guest of honour for their UK launch party.

Once the song from Brown had come on Rihanna got up and stormed out.

The organisers for the party were said to be fuming after they had paid a reported £100,000 on Cristal champagne for their VIP guest.

The party was thrown to launch Jay Sean’s album called All Or Nothing.

Rihanna turned up at the party at about 1am wearing a slinky, cleavage enhancing trouser suit.

She walked up to Jay Sean and apologised for being late soon after she was on the dance floor dancing to Jay Sean hit song Down.

And that was when the DJ spoilt the mood by putting on the Brown track.

A source for Mirror.co.uk says

“It was a massive night for Jay.

“Getting Rihanna there was the icing on the cake. Who knows what possessed the DJ to start playing Chris? It was such a dumb thing to do. Rihanna had looked ready to party as she chatted with Ice-T. But as soon as that song came on, she sat down and raised her eyebrows.

“She couldn’t believe how insensitive the DJ was. She thought he probably played it to get a reaction. She wanted to leave there and then.”