Who's your favorite awards show host?
Ellen [DeGeneres] always does an amazing job. I like the way that she catches people off guard -- it's an environment that can be really uptight, and she disarms people. Also, Jack Black is an amazing host.
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What's your best awards show celebrity encounter? Worst?
The best one was probably with Angelina Jolie at the Kids' Choice Awards. She was so nice and said I did a great job, which made me feel good. And her kid was very sweet. The worst? There have been times, especially in the early days of [the Jonas Brothers'] career, when people were in their own world. They maybe didn't know who we were and were wondering why they were sitting by us, and said so out loud.
What's the most cringe-worthy question you get asked on the red carpet?
I always find it funny to be asked, like, "Why are you here?" There's a better way to say that. Sometimes I'll just be like, "You know what? I don't know why I'm here. Maybe I should go home."
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Words of advice regarding awards show etiquette?
Always have mints on you. You don't want your breath to smell when you meet people that you admire.
Watch The Billboard Music Awards: An Insider's Guide sneak-peek special on Saturday, May 16 at 9 p.m. ET on ABC and the 2015 Billboard Music Awards on Sunday, May 17 at 8 p.m. ET on ABC.
This story originally appeared in the May 16 issue of Billboard.