Singer Lee Hyori was seen arguing with her boyfriend Lee Sang Soon.

OnStyle's "Golden 12" broadcasted on June 21 showed the preparations and performance stage for the charity concert 'Bo:da.'

The first part of the concert was by Lee Hyori who performed "Do Not Forget." The performance drew a lot of attention as her boyfriend Lee Sang Soon himself played the guitar on stage as well.

After returning back stage to the waiting room finishing their performance Lee Hyori criticizes Lee Sang Soon saying, "You made a mistake while performing." To which Lee Sang Soon first replied, "No I didn't make any mistakes" however soon he admitted, "It's true I got it wrong in the beginning."