Hi.I'd like to share with you Smiley's "Dream Girl". The whole song contents of 4 
chords. Good Luck! :)
Intro: Am, G, Em, F

Am (x02210@1)               GI'm (320003@1)sitting alone drinking alcohol
Em (022000@1)           FI'm (133211@1)Writing a song about you
Am (x02210@1)                 GI (320003@1)know it's so sad, maybe even mad
Em (022000@1)                     FBut (133211@1)I know what you're doing behind my back

and it goes on and on 'till the end. Hope you liked it :)