Jillian Michaels' 4-Year-Old Son Phoenix Got His Ears Pierced -- See the Cute Pic!

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Jillian Michaels' son Phoenix just wants to be like his big sister!

The 42-year-old trainer took to Instagram to share a cute pic of her son, but it was his new jewelry that caught everyone's attention.

WATCH: Jillian Michaels Proposes to Longtime Partner Heidi Rhoades in 'Just Jillian' Finale

4-year-old Phoenix got his ears pierced, and according to Michaels, it was all his idea!

"The little man works on his selfie skills," Michaels captioned a cute pic of her son earlier this month. "And yes, he got his ears pierced."

"His sister got hers pierced and he wanted his done. I wasn't about to say 'That's for girls,'" she explained.

While some critiqued Michaels' choice to let her son follow in the footsteps of his big sis, Lukensia, 6, most comments on Instagram praised the former Biggest Loser trainer.

"Cool! I'm trying to be more aware too with gender stereotypes when I talk to my kids," one follower wrote.

"Good for you @jillianmichaels so sick of gender stereotypes," another added. "All that matters is that he is happy and loved."

WATCH: Jillian Michaels Gushes Over Engagement to Heidi Rhoades: 'I Know How Lucky I Am!'

Michaels seems to be having a great summer with her kids; she can't stop posting adorable pics of them on Instagram!

RELATED: 9 of the Most Motivational Moments From Jillian Michaels' Live Speech

While Michaels clearly couldn't be happier with her life now -- she recently proposed to longtime partner Heidi Rhoades -- there was a time she admits she was conflicted about her sexuality.

"I was homophobic, because I obviously didn't know that I was gay," Michaels told ET in January, adding that it was the imagery of bisexuality in Madonna's "Justify My Love" music video that helped her become more accepting.

"When she did that, it was like, 'OK, that's not gross or disgusting,'" she explained. "It kind of allowed me to figure out who I was."

See more in the video below.