Easy guitar riffs for beginners

I've been playing guitar for a few months now and can play smells like teen spirit, smoke on the water, iron man, and the beginning part of one by metallica.

 What are some other easy riffs for me to learn. please advise

"You Shook Me All Night Long" - AC/DCCreeping_Wolf

right thanks.

 now someone else suggest a few more songs please 

"Feel Like Makin Love"-Bad Company. Incredibly easy, plus that song sounds wicked.

"You Shook Me All Night Long" - AC/DCCreeping_Wolf