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Diamonds may be a girl's best friend, but a diamond-crusted whip is a girl's best birthday present!

Lady GaGa presented Beyonce with the naughty sex toy, along with a sexy bra and panties set for the singer's 29th birthday!

GaGa apparently spent thousands on the gift that she presented her "Telephone" and "Video Phone" collaborator with in Jay-Z's dressing room after he peformed with Eminem in Detroit last week, according to The Sun.

"When Beyonce received it she squealed with excitement," said a source. We bet hubby Jay-Z will be squealing with something else when Beyonce finally puts it to good use!