Can we talk about Pretty Little Liars? If you're not down with the US thriller-mystery, which has its season 5 premiere tonight in the US, then this is what you need to know: it follows the plight of four fullsome-haired high-school friends, Aria (Lucy Hale), Spencer (Troian Bellisario), Hanna (Ashley Benson) and Emily (Shay Mitchell), who are being being stalked by a mysterious figure named 'A'. And according to ABC news, it's the most tweeted-about show in history. Ever! Because we're anticipating a social-feed-takeover situation tonight (we'll remain on high spoiler alert until the show gets its official UK air date) let's take a look at the cast's real-life style stats...