The toddler recently attended the 'Poker Face' hitmaker's show at London's O2 Arena with her parents and even met the singer backstage, the Daily Star reported.
A source has revealed that Beckhams were glad to meet Gaga backstage and proudly told her that their daughter is her biggest fan.
The insider added that the family also told the 27-year-old singer that Harper already sings her songs even though she's only two years old.
The 39-year-old former Spice Girls later took to Twitter to say that she had met Gaga, who was very sweet to her children, and added that she is amazing.
--ANI (Posted on 10-12-2013)