I hate those comparions, no one can compare to Madonna's achievements, but in this case, especially those girls who started their careers so early - Madonna didn't explode until she was 25 years old, she had it all figured out by then, being an adult.
But yes, Nelly wants 4x4 to be a single so bad.
Little does he know that Miley already has plans for it to be a single so you don't have to kiss behind Nelly.