Name the songs..

Quiz Time
Here are 3 intros to great rock songs. Any ideas?

INTRO 1 *difficult*
Lerr de doody doody doody
Lerr de doody doody doody
Lerr de doody doody doody
Lerr de doody doody doody
Lerr de doody doody doody
Lerr de doody doody doody
Lerr de doody doody doody
Lerr de doody doody doody

Dum dim... dum de dumbledum
Dum dim.. dum dum, dum dum
Dum...........dum
der dum der dum-bm-bm-bm-bm-bm-bm-gerdump

lerr der-der-der-der diddle diddle
lerr der-der-der-der diddle diddle
lerr der-der-der-der diddle diddle
lerr der-der-der-der diddle diddle
lerr der-der-der-der diddle diddle
lerr der-der-der-der diddle diddle
derr..derr..der..dum
derr.derr..der.dum

(vocals)

INTRO 2 *hard*.

INTRO 3 *easy*

Answers 1, 2 and 3 in the comments please.

Only answer number 1 if you can't play clips at work.

I will reveal the answers HERE on Monday.
Come back and have a sing along with them.