Alessandra Ambrosio
Alessandra Ambrosio

Russell James asked me to shoot underwater. He tied my feet under the water. I don't know how many feet - maybe five, six meters. He tied me underwater and I had no air. Somebody had a tube, and they were giving me some oxygen, but I couldn't really see anything. Everything was blurry. I'm waiting for the oxygen - that was the craziest thing.

Alessia Cara
Alessia Cara

YouTube is my first love.

Alessia Cara
Alessia Cara

I was too shy to do any vocal lessons or go to choirs; I just didn't want to be seen doing it. It's something that I kept to myself. I started easing into it, and I started doing talent shows, and YouTube really helped with that, too.

Alessia Cara
Alessia Cara

I am stubborn enough to know not to change myself.

Alessia Cara
Alessia Cara

I never thought I'd have a career because of YouTube.

Alex Steffen
Alex Steffen

Cities offer us powerful leverage on our most stubborn, wasteful practices. Long commutes in our cars, big power bills from our energy-hogging buildings, shopping trips to buy stuff that'll spend a few short months in our homes and long centuries in our landfills.

Alexander Herzen
Alexander Herzen

There is nothing in the world more stubborn than a corpse: you can hit it, you can knock it to pieces, but you cannot convince it.

Alexander Ludwig
Alexander Ludwig

I don't really have time to watch too much, but I like 'Family Guy' and 'Entourage.' I'm also obsessed with the YouTube series 'Balls of Steel.' It's hilarious.

Alexandra Petri
Alexandra Petri

YouTube is covered in comments that would be better expressed - and better spelled - via a simple thumbs-up or down.

Chris Hardwick
Chris Hardwick

The lifeblood of YouTube is sharing.