Heidi Klum is revealing her secrets on how she keeps her marriage to Tom Kaulitz spicy. "I mean we were just lingerie shopping," the supermodel, 52, tells PEOPLE exclusively ahead of her much anticipated return to Project Runway on July 31.

Heidi Klum opened up about the unexpected secret that keeps her marriage to Tom Kaulitz "spicy" in a candid interview with 'People' published on July 30.

Heidi Klum and Tom Kaulitz have a happy marriage. Klum married her third husband seven years ago, with the pair being vocal and proud about their happy dynamic, which began after meeting at a party in 2018, and getting engaged only months later.