Beyonce and Kelly Rowland grew up practically like sisters and they're still best friends, so it's no surprise that the kids of Destiny's Child are super tight. Kelly tells People that her son, Titan, and Beyonce's daughter, Blue Ivy, are total BFFs.
"They are extremely close. It's the sweetest thing," she says. "It's the greatest thing about friendship, when you're able to grow up together and your children grow up together. They act like cousins."
Blue Ivy is four and Titan is two years old.
Blue is a pretty popular kid and because of her famous mama and daddy, she has other celebrity friends. Earlier this year, she was hanging with Gwyneth Paltrow and Chris Martin's daughter Apple.