Celebrity Love Island star Calum Best snubbed ex-girlfriend Sarah Harding at a computer game launch party, say reports.

The pair were both at the TwentyFour club celebrating the release of computer game Halo 3 when the reality TV star spurned the Girls Aloud singer's attempts to make conversation.

An onlooker told The Sun: "Sarah was totally snubbed by him. She tapped him on the shoulder to have a chat and he ignored her. He just refused to turn around."

Best reportedly spent the evening with Rod Stewart's daughter Kimberley.