IU picked entertainer Boom over actor Lee Dong Wook to the surprise of many.

During the recent filming of SBS 'Strong Heart,’ IU revealed that her "heart fluttered in the past because of Boom's sweetness.”

During the on-site battle of ideal man, IU shocked everyone in the studio by picking Boom over Lee Dong Wook.

On the other hand, IU showed tears on this day as she spoke about her trainee days.

Photo: SBS