Heidi Klum is a "workaholic".

The 52-year-old model has hosted all 20 seasons of Germany's Next Top Model since its premiere in 2006, while she's also served as a judge on America's Got Talent, and Heidi admits that she feels compelled to take a hands-on approach to her work.

She told People: "I'm a workaholic, control freak.

"I've been so focused with the shows that I have been doing and making sure that everything that comes out of them looks good. I love what I do."

Heidi's passion for fashion and design remains undiminished.

She said: "My fashion heart still goes [crazy] when I see something fabulous, when I see an amazing dress, when someone does something new, I'm like, 'How did you come up with that?' I'm still amazed at people and their talent."

Heidi is also looking forward to getting older, insisting that she intends to embrace her gray hairs.

She said: "Don't we all want to get old? I know we always say that, but it's the truth. I'm already looking at 60 and 70, hopefully 80 and 90. And if we're still kicking it then, let's celebrate."

Earlier this year, Heidi observed that everyone should wear "what the heck they want to wear".

The model believes people should be open-minded and ambitious when it comes to their sense of style.

Heidi told People: "I feel like everyone should wear what the heck they want to wear. I feel like that's what makes us all individually special, so I feel like rules are just not the way to go.

"But other than that, I feel like in fashion, anything is possible right now.

"[There are] just no long trains anymore, unfortunately. I'm still wearing one. I don't care now. I'm going everywhere with a train."

Heidi recently returned to host the hit TV show Project Runway, and she has relished the experience.

The catwalk star - who originally appeared on Project Runway between 2004 and 2017 - said: "It's felt like coming home, really like coming home."