Popstar Lady Gaga has presented singer Beyonce Knowles with a diamond-studded whip on her birthday.

The 'Poker Face' hitmaker gifted Knowles the custom-made leather toy and a matching lingerie set at Jay-Z's concert with Eminem in Detroit, Michigan last week, reports dailystar.co.uk.

'Gaga wanted to give her something special. The whip was made out of hundreds of diamonds and leather,' said a source.

'When Beyonce received it she squealed with excitement. The dressing room was decorated with balloons and banners and a lot of champagne had been put on too,' the source added.