The singer, 46, apparently wanted to film her reality TV show "Mariah's World" in the luxury store, but her request was declined after managers felt the superstar's presence would be too disruptive to customers, reported Daily Mirror.
Carey, who is currently on her European tour, apparently wanted to use Harrods' make-up department as the setting to treat a member of her team to a makeover.
It is alleged that the star, who is known for her diva demands, was also refused permission to "film outside of opening hours".
