On September 13, 2011, Ailee along with Wheesung held a performance on the MBC's Chuseok special episode of "Singer and Trainee". Ailee's stage presence was immediately felt by the audience, who was amazed that she was like a professional singer, even though she had not yet officially debuted. Following her solo performance of "Halo" by Beyoncé, singer BMK expressed, "Wherever she goes, she has the potential to be a big star. She definitely has the voice." After the judges had graded everyone, Ailee won first place.