Madonna's daughter was left speechless when she met Britney Spears.
Five-year-old Lourdes went shy and hid behind her nanny when they were introduced.
The toddler told her nanny: "Tell her I have all the watches and all her Barbies and stuff."
But she wasn't the only one who was starstruck: Britney went to pieces on meeting Madonna.
The teenager told Star magazine she felt like a "dork". She said: "I just felt something come over me and I was so nervous.
"I'm so embarrassed at what I said. I said 'I feel like I should hug you'."