When Khloe Kardashian was tapped to be co-host of the new season of "The X Factor," she decided to slim down in preparation for the premiere. That meant giving up one of her favorite foods: cheese. It wasn't easy, she told reporters after the show on Thursday, since she enjoys "cheese on anything, I don't care. ... [I] binge eat." The 28-year-old said she also cut out sweets, but is trying to make some longer-term changes, too.

It's always going to be a lifelong thing for me. And I'm not where I want to be," she said. "When I used to do things like crash diets or things too fast, it never stuck because it wasn't a lifestyle change. So for this, I'm working out consistently like three to five days a week … It's been harder. But I'm just changing my diet slowly."

Kardashian's size has been a topic of public discussion for years, thanks to the fact that the reality star shares the screen with her sisters, Kim and Kourtney, who are both more petite than the 5'10" Khloe is.

"They are 5-foot and 5-foot-2, so I look massive next to them," she told Us Weekly last year. "Everyone expects me to be 9 feet tall and weigh 200 pounds [when they meet me]."

But there's one person who loves her just the way she is: her husband Lamar Odom. "I have an amazing husband who loves my body," Kardashian said on "The Ellen DeGeneres Show" in April. "[He] tells me all the time how beautiful I am."

More celebrity features on Yahoo!:

Why Alton Brown can't eat Girl Scout cookies

Marissa Jaret Winokur drops 60 pounds

2012 CMA Awards Red Carpet

Follow omg! on Twitter

This article originally appeared on Usmagazine.com: Khloe Kardashian talks getting in shape for her new 'X Factor' gig