Kingston Rossdale has always marched to the beat of his own drum.
Whether showing off his funky highlighted hair or donning a pink tutu- as he did at a friend's birthday party this June - the 7-year-old son of singers Gwen Stefani, 43, and Gavin Rossdale, 47, has developed a personal style befitting his glam-rock birthright.
Gwen Stefani Shows Off Her Toned Abs on the Beach with Sons Kingston and Zuma Rossdale
But on July 13, the fearless kid took individualism to a bold new level: He wore full-on makeup.
Kingston hit the beach on Malibu wearing bright lipstick and dark, smoky eyes - and in the process ignited a storm of controversy. Online critics blasted his famous parents for letting their son step out with a painted face.
"This would never happen in my house - girl or boy," wrote one poster on CafeMom.com.
"That is so wrong on so many levels," griped a reader on the U.K.'s MailOnline site, highlighting a debate among opinionated moms on both sides of the pond: Have Gwen and Gavin gone too far?
Experts are divided.
"Kingston should not be supported in his desire to put makeup on to go outside," child psychologist Dr. Vicki Panaccione tells In Touch. "It's not about being something that boys don't do - makeup is for teens and adults. Period."
Gwen Stefani and Gavin Rossdale Sport Matching Memorial Day Hair (PHOTO)
But parenting expert Dr. Michelle Borba argues that experimentation is a good thing:
"Allowing a child to wear makeup can boost self-expression and creativity."
Kingston's mom and dad embraced their own edgy looks long ago - and Gavin himself has been known to wear makeup - so it's not a huge surprise their little ones are following suit. (Kingston's brother, Zuma, 4, is often spotted wearing nail polish.)
For more on this story, pick up this week's issue of In Touch, on newsstands now!