KARA's member Goo Hara revealed the diet move to get a 'sexy back'.

On SBS entertainment program "Star King" aired on September 6, Yoo Sun Hee revealed her workout tips for her skinny, fit body.

At this, Goo Hara copied the move that she was showing. Goo Hara wore a tight workout outfit to demonstrate it herself, catching much attention.

Internet users who saw this commented, "She's so pretty," "She got prettier," and "She's so good at it."