It's been almost a decade since Reddit introduced the world to the Ask Me Anything forums, where a celebrity or politician (remember The Goold Old Times when those were two different categories.
It's rare that an Ask Me Anything makes the news when it's successful. A person answering the questions they're asked should be satisfying and worthy of note, but I only hear about them when they go horribly wrong: when someone has recently had a scandal, and somehow believed that people would be more concerned with their latest album or artistic vision than their social or political faux pas.
There a few different ways to approach this as a prompt. Either write a series of ten to twenty questions, and ask someone else to come up with the person or concept that has to answer them, OR come up with a person or concept that you want to act as a voice for, and crowdsource some questions that people would like your character to answer.
Write Or Die
Scott Woods's Twitter Prompts
Rachel Mckibbens' Prompt Blog
The 30/30 Prompt Blog
Asterisk And Sidebar Prompts