Over the years, Frank Iero’s had a pretty storied career, both as the guitarist of My Chemical Romance and as a solo artist. Which is why, during our recent In Conversation event with him, one fan’s question got an especially interesting answer: if Frank could only play one song that he wrote for the rest of his life, what would it be? “Best Friends Forever, I think,” said Frank after a moment’s pause, to the immediate ‘AW!’ of the crowd. “It’s true, though! It’s really special to me. It’s a song that started with my daughters singing to each other, to kind of, like, make each other mad, and we turned it into something that was really great. And they were young when this all started! It’s so amazing to me. “First off, I’m, like, amazed that I’m this lucky that I get to be t...