On Nov 7, Ruby Lin and Ann Hsu went to Jolin Tsai's concert together.
The celebrities were photographed by fans. According to Asian E-News Portal, based on the photos, Ruby and Ann seemed to be drinking wine secretly at the concert venue.
This was a violation of the rules as the venue disallows the consumption of food and drink.
It is reported that Ann started to drink the small bottle of red wine first followed by whisky, and passed it to Ruby.
After the news was released, they denied drinking the substances and was only playing around.
Ruby has also apologised to the public through her manager.
See photos related to the article in the gallery below.