I think the rapid rate at which people started caring and paying attention, because it's just something that I don't think you can really prepare for - there's no textbook on it. Just the amount of interest that people have in me and Alice and the "Twilight" series and the rest of my cast.

[Mackenzie Foy] is really a fantastic actress and she's very professional, but she is still a kid and that's really nice to see, whenever there is a balance and they're able to have fun and play on set, but still go home and hang out with friends her age. I was really impressed with her. I think the biggest change for us is that we had a "swear jar." And she was rich - she made more money than us.

Honestly, I just try to drink lots of water and get a decent amount of sleep!

I did side planks for my obliques, which are one of my trouble areas. And traditional planks tone your back so you don't have that little bit of fat hanging over your bra. Ugh!

I work with a charity called Donate My Dress. It's got chapters all over the country where you can donate special-occasion dresses. Prom is a big deal when you're 15 years old, and it enables girls who don't have the money to come in and choose something special.

You can't control the paparazzi. But if you go to Coachella you're going to get photographed. Whereas if you're at home, walking down the street you probably won't. It's something I've learnt to navigate my way around but I try to keep my private life private.

In California, I do like to just chill out and go to the beach, but I love the energy here. I feel very productive when I'm in New York.