Heidi Klum and Joan Collins Debate 'Who Has More Fun' — Blondes or Brunettes

Heidi Klum and Joan Collins are settling an age-old debate — do blondes have more fun than brunettes?

The supermodel, 50, and the Dynasty actress, 90, pondered the question together in a video posted on Klum's Instagram grid on Saturday.

"I know I say that blondes have more fun, but maybe brunettes have more fun?" the Germany's Next Top Model host asked the camera in the clip, before panning to reveal Collins seated next to her.

Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from celebrity news to compelling human interest stories.

"Well, Heidi, you look like you always have fun, but I've been having fun for a lot longer than you have," the Dynasty star answered with a laugh.

"I think we have a lot of fun. I think we both have a lot of fun," Collins continued.

"We all have a lot of fun — it doesn't matter what hair color," Klum concluded at the end of the video, and Collins agreed. So, the debate lives on!

Per Klum's caption, the unlikely duo was on the set of her show GNTM, the modeling competition reality show she's hosted since its first season in 2006.

"Blond or brunette! Who has more fun? @joancollinsdbe ❤️ GNTM," she wrote. Collins will likely appear on the upcoming season of the show as a guest judge.

No matter who has more fun, one thing is for sure — both women can serve a look.

In the video, Klum wore what appeared to be a magenta top, adorned with a statement jewelry piece for added pop. Collins looked glamorous in a silvery white suit jacket embellished with paillettes.

Both women finished their looks with bold lip colors and wore their hair down, proudly showing off their bangs.