showed off her funky style as she attended her son Apollo's flag football game with son Kingston and his girlfriend on Sunday.

The mother-of-three, 53, wore a pink bra under a white shirt with a baggy flannel top, khaki pants, and maroon Doc Marten boots.

The star's eldest son Kingston, 16, was also seen planting a kiss on his girlfriend as he stood behind his mother.

Style: Gwen Stefani showed off her funky style as she attended her son Apollo's flag football game with son Kingston and his girlfriend on Sunday 

Gwen accessorized with a white 'Cowboy Hat,' large gold hoop earrings, and multiple necklaces.

Gwen showed up with her whole family, including her mom and dad, her brother, sister-in-law, niece, and nephew, but without husband Blake Shelton.

Stefani’s ex-husband, Gavin Rossdale, 56, attended the game with his girlfriend Courtney Cannan and her dog rooting from the sidelines.

Sixteen: Gwen, 53, cut a youthful figure in baggy trousers and a flannel as her son Kingston, 16, kissed his girlfriend 

Fashionista: The Just a girl singer wore a white baseball cap, large gold hoop earrings, and multiple necklaces

Forever young: The No Doubt lead vocalist strolled alongside Kingston, 16, and his girlfriend

The No Doubt lead vocalist is the mom to three boys, Kingston, 16, Apollo, 8, and Zuma, 14, whom she shares with her ex Rossdale.

Earlier this month, Gwen celebrated her 53rd birthday, which shocked fans about her age because she looks good.

One fan joked on social media at the time: 'Please just let me age like Gwen Stefani.

'

'Gwen Stefani is either ageless or freeze-dried,' another quipped.

Another fan said, 'Gwen Stefani looks ageless. She's looked the same since Hollaback Girl. Werk it.'

Family outing: Stefani and her 8-year-old son Apollo smiled as they walked together after his flag football game

Fans couldn't believe her age, with one writing on social media: 'Please just let me age like Gwen Stefani'

In the past, the singer has shared her secret to achieving what appears to be eternal youth.

While riding with James Corden in 2016 for his Carpool Karaoke, The Voice judge opened up about why she doesn't seem to age.

This comes after the Late Late Show host compared her to Benjamin Button from the 2008 Brad Pitt movie The Curious Case Of Benjamin Button where his character ages backwards.

Gwen attributed her agelessness to 'falling in love,' after her life 'blew up' and the rejuvenation that came from writing a record about it.

How she does it: In the past, the singer has shared her secret to achieving what appears to be eternal youth. She told James Corden in 2016 that 'falling in love' had a lot to do with her looks

'So that's what the facelift is,' she told James Cordon in the car.

'I'm writing music about happiness and truth.'

Beyond the cosmetological effects of falling in love and writing music, Gwen revealed her beauty routine in an interview with earlier this year.

She said keeping it simple, being consistent and having discipline is the key to her looks.

'I've always kept my skincare pretty simple and minimal,' said the style icon.

'My morning routine usually includes a prayer, brushing my teeth and moisturising. Occasionally I'll do a facial massage to decrease any puffiness.

'

The Hey Baby singer is vigilant about never sleeping in her makeup.

'At bedtime,' she told Forbes, 'I always take off my makeup and put moisturiser on.'

Another golden rule that the hitmaker embraces is keeping her skin hydrated.

'The one skincare rule that I love, especially as I've gotten older, is hydration. I like to keep my skin looking super dewy as opposed to matte, overly dry and powdered.'

Youthful: The star has said in the past that her skincare routine is simple, consistent and disciplined.

She also attributes hydration to helping her age backwards