Singleton Question

/* Sample Singleton Class */
public class Singleton {
    public static Singleton singleton = null;

    protected Singleton(){}

    public static Singleton get(){
        if(singleton == null){
            singleton = new Singleton();
        }
        return singleton
    }

    public boolean uselessFuction(){
        return true;//Lets pretend this does something usefull
    }

    /* HERE IS THE QUESTION */
    /* Should I do this: */
    public boolean loggedIn(){
        boolean somethingUsefull = Singleton.get().uselessFunction();
        return !somethingUsefull;
    }

    /* OR this: */
    public boolean loggedIn(){
        boolean somethingUsefull = uselessFunction();
        return !somethingUsefull;
    }
}