Na na na na na na na nanananana

There are websites that you can hum melodies, and it will give you the best possible matches, given you are humming the melody correctly.

It kinda goes like "dododo doo doo doo dododo doo doo dOOOooo dodod dO DO DOOOOo do DO DOO"

The song you are looking for odd na na na by my chemical romance if you are looking for other songs please let me know

The one from the title is Iron Man, yes?