AceShowbiz -

Shay Mitchell recently hit a milestone on YouTube and she had a special gift for her loyal followers in return. The Emily Fields of "Pretty Little Liars" shared on her YouTube channel a video of her running naked through the streets of L.A. after reaching 3 million viewers on the video-sharing platform.

"I can't tell you how much this means to me to have you guys coming along since when I first started the channel is was uncharted territories, and now it's just a learning experience every single week," she said at the beginning of the video. "While I wasn't intending on sharing this video with anybody, I thought, 'Why the heck not?' "

The 30-year-old actress said it was her assistant Sammy who brought up the vow she had made on a previous Moroccan getaway. Sammy asked her, "Do you remember in Morocco on our 'Shaycation', you were like, 'I'll run through the street naked when I hit three million subscribers on YouTube' - do you remember that conversation?"

Shay said she'd do it if she had a mask and Sammy got a unicorn mask for "The Heiresses" star. Up for the challenge, she said, "A bet's a bet, a deal is a deal," before she began to take off her clothes and got out of her house.

She stripped down to her yellow panties which had the words "nice buns" on the backside. Wearing the mask, she ran down the streets nearly naked while Sammy followed her in a car to videotape it. At one point, she passed by a woman who looked both confused and amused as she caught Shay in the act.

Shay wrote in the description of the video, "Well, here it is guys. Thanks for 3 million on YouTube! Many more adventures to come... I PROMISE. xoxo - Shay."