Singer IU revealed the details about her diet.

During an episode of the KBS "Entertainment Weekly" IU was a featured guest and spoke honestly about what her diet consists of.

IU was asked, "Was there something that you really focused on while you were preparing for the release of your new album?"

IU answered, "I think it was my diet. I gained a lot of weight while I was filming for the drama. I needed to show a different side of myself as a singer so I went on a diet."

She continued, "I eat an apple in the morning and then later in the day I eat a little bit of sweet potato and water. At night, I drink protein."

People in the online communities responded with comments like, "How does she go on with a diet like that?", "Props to IU for keeping up with such a hard diet", "She seems like she really lost a lot of weight" and "It's not something anybody can do."