Whether you're being followed by a psycho stalker named "A" or one of the hottest young celebs in Hollywood, everyone has time to jam along to the internet dance sensation, the "Harlem Shake." But apparently, one of the Little Liars never got the memo.

"I must be living under a rock because I honestly don't know what the Harlem shake is," Lucy Hale (Aria) tweeted yesterday (April 1). We expected more from you, Luce!

As for how she got introduced to the wacky dance phenomenon?

Keegan Allen (Toby Cavanaugh), Ashley Benson (Hanna), Shay Mitchell (Emily), Tyler Blackburn (Caleb), Troian Bellisario (Spencer), and Lucy took a break from filming Season 4 to do their own version of the dance. We repeat, the PLL cast did the Harlem Shake.

If you're living under a rock like Lucy is and haven't seen it yet, check out the video ASAP!

Pretty Little Liars
Season 4 premieres on Tuesday, June 11, 2013 at 8 p.m. ET/PT on ABC Family.