Just skip straight to 8:12 to find this secret to a happy life.
It saves lives. And yes that's the secret - I'm so proud if you guessed correctly before this sentence spoiler. No joke, though, this video made me fall in love with Ariana Grande for her personality alone between the belt-it-out sessions. A great sense of humor, especially at the expense of yourself, is such a beautiful thing. Keep on girl! We see you!