Clarkson, who recently wed hubby Brandon Blackstock and has made no secret of her desire to start a family, revealed the advice during a new interview with US Weekly.
In the latest issue of the magazine, the star said mum-of-one Adele told her at this year's Grammys: "'Girl, don't have a baby 'cause everything else will go on the back burner. I'm living in baby land!'"
Adele welcomed her first child, a son, in October of last year and has made just a handful of public appearances since the birth.
However 31-year-old star Kelly doesn't seem to have been deterred, telling US writer Ian Drew: "My eggs aren't getting young! Brandon has two kids and I want two more."
The Since U Been Gone singer is currently promoting her Christmas album Wrapped In Red.
Personally I think it's best to wait on having kids after getting hitched. But girl do you!
Do y'all want babies? How many?