'Pretty Little Liars' season finale: Who learns 'A's' identity?

The cast of "Pretty Little Liars" --  Shay Mitchell, Ashley Benson, Troian Bellisario, and Lucy Hale -- let a few season finale secrets slip out at the Teen Choice Awards on Sunday (Aug 8).

[ SPOILER ALERT: Don't say we didn't warn you.]

If you're worried about spoilers, you may not want to watch the video above. For those who chose to maintain a level of innocence before the finale airs, here are a few semi-safe snippets: