You bring out a good point, a distinction that should be made. Everybody's got abs underneath their fat. But not everyone's abs are hypertrophied to the same extent. To make them 'pop' is to make them bigger, as you would any other muscle. Still need to get the fat off though. And I doubt that you have to go single digits to get them to pop. Guys lie about BF% all the time. 12% or below is outstanding for a guy.