Lady GaGa reportedly gave Beyoncé a diamond whip and lingerie for her 29th birthday.
GaGa apparently wanted to give the RNB star "something special" as the pair have remained friends since recording 'Telephone' together last year.
A source told The Sun: "The whip was made out of hundreds of diamonds and leather.
"When Beyoncé received it she squealed with excitement. The dressing room was decorated with balloons and banners."
GaGa allegedly presented Beyoncé with the whip and matching underwear in Jay-Z's dressing room, before singing 'Happy Birthday' to her. They then shared a bottle of champagne together to celebrate.