United Kingdom, May 30 -- Kelly Clarkson's nine-year-old son "refuses to brush his teeth".

The 43-year-old pop star - who has son Remy and daughter River, 10, with ex-husband Brandon Blackstock - has found an unusual way to encourage her son to embrace dental hygiene.

She said on 'The Kelly Clarkson Show': "I have a boy and a girl. And my boy and I have a real hard time. He's gonna hate me saying this, I don't care, because maybe it'll shame him into doing it. But he just refuses to brush his teeth."

Despite this, Kelly has found an innovative way to get Remy to brush his teeth.

She shared: "It's like a thing, and so finally, I was like, 'Hey, let's make a fun thing of it.' So I was in the shower, I'm like, 'Just take your toothbrush ...