Here is the tab for the song K'naan - Waving Flag.

h = Hammer On
p = Pull Off
~ = vibrato

chords:
C    - 032010
Fmaj - 133211
Amin - 002210
G    - 320033

Intro:
|----------------------------------------------------------|
|----------------------------------------------------------|
|----------------------------------------------------------|
|----0-0h2p0---3-3---3-2-0---2-2--2-0----0-0-0h2p0---------|
|3-3--------3------------------------3------------3-2---3~-|
|----------------------------------------------------------|

After the intro there are some drum sounds; you can use tap your guitar
in the rythm.

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After that it's just chords:

C (x32010@1)     Fmaj (133211@1)    Amin (x02413@1)  GOoooooh (320003@1)Wooooooh, Ooooooh Wooooooh (2x)
C (x32010@1)              Fmaj (133211@1)        Amin (x02413@1)          GGive (320003@1)me freedom, give me fire, give me reason, take me higher
C (x32010@1)                Fmaj (133211@1)              Amin (x02413@1)         GSee (320003@1)the champions, take the field now, you define us, make us feel proud
C (x32010@1)                Fmaj (133211@1)             Amin (x02413@1)         G (320003@1)     
In the streets our heads are lifting, as we lose our inhibition,
C (x32010@1)          Fmaj (133211@1)         Amin (x02413@1)         GCelebration, (320003@1)its around us, every nations, all around us
C (x32010@1)             Fmaj (133211@1)                               GSinging (320003@1)forever young, singing songs underneath that sun
C (x32010@1)                           FmajLets (133211@1)rejoice in the beautiful game,
                               GAnd (320003@1)together at the end of the day.

We all say
C (x32010@1)              FmajWhen (133211@1)I get older I will be stronger
Amin (x02413@1)                   GThey (320003@1)ll call me freedom, just like a waving flag
C (x32010@1)              FmajWhen (133211@1)I get older I will be stronger
Amin (x02413@1)                   G (320003@1)                CThey (x32010@1)ll call me freedom, just like a waving flag
             Fmaj (133211@1)              Amin (x02413@1)              GSo (320003@1)wave your flag, now wave your flag, now wave your flag

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From there on the song keeps repeating itself. This was my first tab so feel free 
to comment. Goodluck!