IU revealed her special way of warming up her vocal chords. She appeared on the April 2nd episode of MBC's "Quiz to Change the World" and received praises from the cast by showcasing her strong vocals. When asked about her 3-step booster, the idol said, "I have never made a mistake because I've always performed when I was nervous." She added, "You [also] have to warm up your vocal chords well." IU then revealed her own method of warming up, saying, "Rehearsals usually start in the morning, but my vocal chords don't warm up well. It's not a good method, but I eat a cup of ramen really quickly. Because it's hot and spicy, my vocal chords open up momentarily. It's not a good method." IU also revealed that her weight changed after she debuted. When asked about her maturing beauty, the teen star announced that she lost 10 kg compared to her pre-debut days. She elaborated that she naturally lost weight as a result of her busy schedule. MC Park Mi Sun commented that she became more womanly and IU replied shyly, "I lost a lot of baby fat." Source: Newsen via Nate, TV Report via Nate