The title of her blog post was "Hul ke ke ke ke G-Dragon and Bom ke ke ke ke ke Solo scene for MV"

She posted the photo above and said like she went to Jeju for a school trip and then she saw GD filming for 'Oh Yeah' MV. At that moment she saw him in a white car. She also said something about Park Bom and TOP, I'm just not sure if she said they were in the set or not.

Rough translations only! I will update this for corrections.
Source: qlswjd56@Naver