Kelly Rowland's son and Beyonce's daughter "act like cousins".

Kelly Rowland

Kelly Rowland

The 'Motivation' hitmaker has revealed her two-year-old son Titan is "extremely close" to former Destiny's Child bandmate Beyonce's four-year-old daughter Blue Ivy.

She said: "They are extremely close. It's the sweetest thing. 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."

And the 35-year-old singer - who has Titan with husband Tim Witherspoon - also gushed about how blessed she is to have her little family unit.

She shared: "He's awesome and I'm so blessed to have him. Tim is an excellent dad. We have a nice little unit, us three ... Titan is a boy's boy. But, if he hears myself or anybody singing, he's going to repeat it. I can't wait 'till Jenny [Hudson] gets to the house so we can play, vocally, together. He's a sports little guy, trains guy, planes guy."

Kelly hasn't ruled out the possibility of having another kid but admits she's got her hands full at the moment.

She told People magazine: "One more is just fine! I feel like he's a handful - drawing on my walls and cussing me out!"

Meanwhile, the 'Kisses Down Low' singer previously admitted having a baby forced her to look at her body differently.

She shared: "I wish that someone would invent something to take away stretch marks and cellulite. If you don't have stretch marks and cellulite after you had a baby, I really don't like you. It's just not fair. Giving birth challenged and changed the way I looked at my body.

"When I made 30-something happen, I just felt this click of everything kind of falling into place, and really feeling comfortable in my skin ... feeling myself."