Will Smith plays the last man on Earth in I Am Legend, and at the premiere at the Wamu Theater at Madison Square Garden, when we asked the predictable “what if it were you” question, there were lots of predictable answers — living in mansions, driving other people’s sports cars, wearing diamonds, finding food, etc. But rocker Pete Wentz had a refreshing outlook on the whole scenario: “I’d probably just go everywhere naked,” Wentz figures. “I like being alone a lot,” the Fall Out Boy front man told us. “I turn off my phone. That’s my best way to do it.” Based on trailers of I Am Legend, however, Wentz questions the premise. “From the preview, it looks like he’s got his dog in the movie. And that’s not really like being alone. That’s like … a dog buddy flick, you know.” And Wentz never quite feels alone with his English bulldog, Hemingway, around. “He looks like an alien,” Wentz says. “He looks like Stitch, and he behaves like Stitch, actually. Prime mission: to destroy everything I have in my house. He’s like, is this an antique book? Delicious!” What a bummer. Now we can’t name our dog Hemingway. —Bennett Marcus