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IU shared on her official Facebook on the 10th, "Congratulations on 2000th day anniversary since debut?�Now she is solving the exam '#IU�Section' from U-AE-NA! It somehow became the 2000th day since her debut?? Singer IU is sincerely solving the exam questions that U-AE-NA set for 'IU Section'. Thank you, U-AE-NA who consistently loved [IU] during those 2,000 days!"

Although it's been a while since she graduated from school, IU proved that she'd willing to take a test for her fans, concentrating and working hard to solve the fan-made questions.

Happy 2000th day, IU!