The High School Musical star, 22, has had a butterfly inked on the back of her neck which her friend, MTV VJ Ruby Rose, unveiled to followers on the social networking site.
Earlier in the evening the pair had been enjoying dinner with Australian band The Veronicas.
Ruby then tweeted: “Please don’t blame me… But I may have convinced Vanessa hudgens to get a tattoo… Now. Her first.. by bang bang.” (sic)
Famed tattoo artist Bang Bang is the man responsible for most of Rihanna’s ink.
Ruby uploaded a picture of Vanessa and Bang Bang posing together, before tweeting that the actress was unsure whether to go for her ribs or neck.
After letting her followers know Vanessa had chosen a spot on her neck, she sent followers a snap of the tattooist at work on the Disney star.
Ruby then posted the finished results four hours later.
She was forced to apologise for the pictures, saying she was “embarrassed over the situation” and regretted that someone had “taken those photos.”