She may be the nation's sweetheart now, but singer IU confessed that in the past, she had received harsh criticism while singing on stage. On the episode of SBS TV 'Strong Heart' that aired on December 27th, IU shared a story about a time she wanted to cry on stage. "There were two times in life where I wanted to cry," she said. Once was during her debut stage. It was a day where a lot of boy groups were performing, and a lot of girl fans were there to cheer the boys on. It was these girls that began yelling harsh things to IU. "Once one person started, all of them began joining her," she continued, thinking back to that day. IU was only sixteen when she debuted and still had a lot of baby fat on her face, and she revealed that the girls in the audience called her a pig. "The 3-minute song felt so long and regardless of whether or not I was popular, I thought they would listen to my song, but that wasn't the case," she said. "After that incident, I'm not discouraged even if the audience is silent after my performance. I am strengthened by the quiet sounds of cheers." Source & Image: TVReport via Nate