London, July 17 - Australian pop star Kylie Minogue's relationship with her Spanish model boyfriend Andres Velencoso has hit rocky waters ever since she slapped him in a bar.

The singer had a blazing row with Velencoso, whom she started dating last November, at New York's trendy B Bar, reported thesun.co.uk.

'At some point, Kylie and Andres got separated. When Kylie found him, she slapped him in the face with a fan. Then she yelled at him for making her wait outside while he stayed inside and got another drink,' said an onlooker.