IU revealed on "Happy Together 3" that she was scammed many times before and thus could connect perfectly with her character in "You're the Best, Lee Soon Shin."
When she was trying to debut as a star, she got cheated by many entertainment companies. She advised people who want to get into the entertainment industry that they need to be careful of companies that ask for money, stating her own experience that "I was swindled by three companies before I realized what was happening. These companies can demand up to 3 million Won. If you do succumb to their high price, all they do is give you a few stints as an extra. I actually lost a great deal of money to these guys.”
Poor IU... she was so young when she debut so of course she wouldn't have known about this... at least she's successful now!