“America’s Got Talent” judge Heidi Klum, 45, has been dating musician Tom Kaulitz, 28, for several months, and she says their age difference isn’t affecting their relationship!

Klum explained to InStyle, “Lately, I’m being reminded more about my age by people other than myself. My boyfriend is many years younger than me, and lots of people are questioning that and asking about it. That’s really the only time when age seems to be shoved in my face and I have to give an answer for it.”

Age ain’t nothin’ but a number to Klum. She added, “I don’t really think about it that much otherwise. You have to just live a happy life without worrying too much about what people think because worrying is only going to give you more wrinkles.”

Klum and Kaulitz started dating six months after she called it quits with art dealer Vito Schnabel, 31.