We smell a new squad in our midst!
However, it appears the epic collaborative performance gave an even cooler gift in the form of new best friends, Blue Ivy Carter and Apple Martin.
For the snap, the Oscar winner wrote:
Britney Spears is a superstar, but that doesn't mean she isn't a super supportive family member, too!
Here's what she said on a social media site:
"Wishing my Uncle Happy Birthday…"
What a sweet and thoughtful gesture!
Her uncle is so LUCKY to have a niece who doesn't DRIVE HIM CRAZY!!!