Adam Levine went old school when he decided to propose to his fiancee, Behati Prinsloo.

"[The ring is] from the 1930s. It's vintage and he picked it out," the Victoria Secret model told ABC News about her new bling.

Levine, 34, the Maroon 5 singer and "The Voice" judge, got engaged to Prinsloo in Los Angeles this past weekend.

Related: All About Adam Levine's Fiancee, Behati Prinsloo

Prinsloo, 24, spoke to ABC News while promoting her new fragrance for Victoria Secret.

The Namibia native, who became an a Victoria's Secret angel in 2009, also spoke about some of her obsessions, even some she has a love-hate relationship with.

"I watch ID Investigation, like 'Fatal [Encounters],'" she said of her guilty pleasures on TV. "I freak myself out and I'm alone in my house like, 'Why am I doing this?' but I cant stop."

The shows even cause Behati to lose sleep, on occasion.

"One time, I stood by [the] bedroom door and looked outside," she said. "I thought someone was there the whole night. But now I'm good. Now I can sleep. I have peace."

Especially now that she has Adam to keep her safe.

Watch: Adam Levine Is Offically Off the Market

Another favorite is the actor Christopher Walken.

"He's my all time favorite," she said. "'True Romance' is one of my favorite movies. When he talks to the dad, it kills me. He's so good!"

(Photo Credit: Dimitrios Kambouris/Getty Images)