Shay Mitchell is Very Careful While Live Tweeting 'Pretty Little Liars'

Shay Mitchell shows off her best super shocked face while making an appearance on VH1′s Big Morning Buzz on Tuesday (March 18) in New York City.

The 26-year-old actress went on the show to promote the season four finale of Pretty Little Liars, which airs tonight on ABC Family!

“I’m always very careful tweeting,” Shay told host Nick Lachey about using social media during the Pretty Little Liars airings. “If you mess up, a lot of people are going to see it.” Don’t spoil us tonight, Shay!

Also pictured inside: Shay appearing on Good Morning America earlier that day.

FYI: Shay is wearing a Sachin + Babi top and Zadig & Voltaire Posh pants with a Vita Fede bracelet and an Alex Mika Jewelry ring.

25+ pictures inside of Shay Mitchell on VH1′s Big Morning Buzz…