Katy Perry would like to be a mother someday, whether there's a man in her life or not. "I want to be doing that in the right time," the pop star, 29, says in the new issue of Rolling Stone, out Friday. "And that's not in the next two years, you know? Maybe it's in a five-year plan, but I need to really be able to focus 100 percent of my attention on it. I don't really want to take the child on tour. Not until, like, birth through five is over." As for the possible father, she declares, "I don't need a dude," clarifying, "I'm not anti-men. I love men. But there is an option if someone doesn't present himself."