And to think she bawled her eyes out before she had to sing it on account of her being "scarred" by an incident from her childhood. You're Dad laughing for "an entire week" after you sing in front of your school will do that to you.

Speaking of having to lend her vocals to the Mockingjay Part 1 soundtrack, the actress said on Letterman: "I do not like singing in front of other people, that's like my biggest fear. I cried on set that day. I'm scarred from my childhood. I have a Southern mother that used to tell me I was amazing at everything and I could do everything, but I can't. 'I had this tone-deaf Amy Winehouse voice and I sang in front of the school when I was eight, because I thought I could. My dad laughed for the entire week! I'd hear him around the house, imitating me. I hate it, I hate it!'

If you fancy watching the interview in full, here it be. Make yourself a cuppa; it goes on for 21 minutes.