Demi Lovato Praises Kim Kardashian for Helping Her Accept Her Curves

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Demi Lovato is thanking Kim Kardashian for helping her feel more confident.

In a sneak peek clip from her appearance on The Ellen DeGeneres Show that airs Wednesday, the "Cool for the Summer" singer reveals that the reality TV star and her famous family inspired her to be more accepting of her body.

WATCH: Demi Lovato 'Proud to Show' Her Body in Unretouched Selfie

"When I was growing up, at the kind of age where your body starts changing and you want to be cool, it was in that era of when very, very, very thin people were the popular people in Hollywood," she explains. "So that's what I had to look up to. And after having had my issues with eating, looking back I thought, 'I want to be the difference for people growing up' because I wish that somebody had gone to me whenever I was 12, 13 and said, 'Hey, you don't have to look like that to be cool.'"

The former Disney star, 23, has been very open about her past struggles with bulimia, as well as cutting, dealing with bi-polar disorder and addiction, all of which prompted her to enter rehab in 2011.

"And when the Kardashians came on the scene, that was the first time that I really associated curves with beauty and it was just so new to me," she continues. "I remember thinking, 'Wow, that's so cool' and even in a time where I was still struggling with food, I was able to look at Kim's curves and be like, 'I should really be proud of my curves.'"

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"Now obviously there's tons of beautiful, curvy women out there, but it made me feel more confident in my skin to do that Vanity Fair shoot," she adds.

The shoot Lovato is referring to took place last October, when the songstress posed fully nude and makeup-free for the fashion magazine. The unretouched photos were shot spontaneously by photographer Patrick Ecclesine.

"When I did the shoot, I said, 'I want it to be real, I want it to be authentic,' and so we did no clothes, no makeup and no Photoshop," she says. "It was a very quick shoot."

WATCH: Wilmer Valderrama Says He Loved Demi Lovato Exactly When She Needed Him

DeGeneres also got Lovato to open up about her relationship with her longtime boyfriend, That '70s Show actor Wilmer Valderrama.

"Look at how handsome he is," the singer adorably exclaims as a pic of her 36-year-old beau appears on screen. "I met him six years ago and we were friends at first. I was head-over-heels and he was like, 'Uh, stay away until you're old enough.' We've been off and on for about five and a half years."

Despite rumors that the two are engaged, Lovato quickly shut them down, showing off her left hand and saying, "I don't see a ring!" Marriage isn't exactly out of the question, however.

"I wouldn't mind if I saw one," she confesses. "But there's time for everything. We've been together this long. Obviously I'm not going anywhere and vice versa."

WATCH: Demi Lovato Goes Makeup-Free for Date Night With Wilmer Valderrama

As we patiently wait to see Lovato's full guest appearance on Ellen airing Wednesday, watch the video below to hear the details on her most recent date night with Valderrama.