Nick Jonas's ex-girlfriend Olivia Culpo posed naked for 'Treats!' magazine. The former Miss Universe's nude photos hit Treats! Magazine Issue #9 on Wednesday, July 29 and rumors say Culpo's ex-boyfriend Nick Jonas, 22, is regretting the break up.

 "I have never done a nude shoot before," Olivia Culpo told Treats.

"I had been asked, but honestly I did not feel comfortable because I was fearful of how it would be perceived. Once I realized this was an opportunity to express myself in a way I hadn't before, in such an organic and candid sense, the experience became more about art and emotion than me as a physical being."

Olivia's photoshoot was shot by renowned photographer Tony Duran.

"This shoot was more about letting myself go emotionally," Olivia said.

"Tony was adamant about having no makeup on the shoot, so there was no hiding behind make up or clothes to define me...I really enjoyed putting myself out there. It is very liberating to show who you really are. There is a sense of empowerment that I got from the shoot that is hard to explain."

Nick Jonas has been insisting that he is single but says he is "probably" banned from dating pageant girls after the Olivia Culpo breakup.

"I was with [Olivia Culpo] for two years. We had a beautiful relationship together and it was great. It was time for that to end, which is sad," Jonas admitted on Ryan Seacrest's On Air radio show on Friday. "But I'm single. Contrary to what people I think, think. It's just mind-blowing to me how these things start."

"I'm doing OK," Jonas told ET. "It's very tough and we had a beautiful two years together and [I have] nothing but love and respect for her. But it's always hard and my thing now is focusing on my work and staying as busy as I can, as creative as I can be. These are the times you've just got to dive in and get lost in your work and that's what I'm trying to do."

"I have regrets about not being open with relationships in the past. That's the thing that makes it actually more challenging. On many levels you try to hide the relationship or do things to make it more private but that just adds more stress on the relationship. Whereas this relationship I was in was open and public and there's a lot of comfort in that and support."

Nick Jonas and Kendall Jenner were also rumored to be dating.

"We're not dating," Jonas told E! News on Friday.

"Kendall is great and naturally with her being good friends with Gigi [Hadid] and with Joe [Jonas] and Gigi dating. There are times we'll be in the same place and we all hang out."