Nothing wrong with the last one but knowing Noels love of a capo on the 4th fret i 
play it like this :)

Capo 4 - Chords relative to the capo

For effect hammer on and off the b string when playing the Am ( listen to the song 
for strumming pattern )

Intro: Am

AmSomeday (x02210@1)you might find your hero
AmSome (x02210@1)say you might lose your mind
AmI (x02210@1)keeping my head down now for the summer
AmI'm (x02210@1)outta my mind let me pull the other
AmI'm (x02210@1)gonna take that tiger outside for a ride

F  Dsus2  Am
What a liiiiiiife!
       F (133211@1)Dsus2 (xx0230@1)AmWhat (x02210@1)a liiiiiiife!

AmKeep (x02210@1)on chasing down that rainbow
AmYou'll (x02210@1)never know what you might find
AmOver (x02210@1)the sunset on the horizon
AmMaybe (x02210@1)you dream but it tastes like poison
AmI'm (x02210@1)gonna take that tiger outside for a ride



F  Dsus2  Am
What a liiiiiiife!
       F (133211@1)Dsus2 (xx0230@1)AmWhat (x02210@1)a liiiiiiife!
       F (133211@1)Dsus2 (xx0230@1)AmWhat (x02210@1)a liiiiiiife!
       F (133211@1)Dsus2 (xx0230@1)AmWhat (x02210@1)a liiiiiiife!



F  Dsus2  Am
What a liiiiiiife!
       F (133211@1)Dsus2 (xx0230@1)AmWhat (x02210@1)a liiiiiiife!
       F (133211@1)Dsus2 (xx0230@1)AmWhat (x02210@1)a liiiiiiife!
       F (133211@1)Dsus2 (xx0230@1)AmWhat (x02210@1)a liiiiiiife!



AmSomeday (x02210@1)you might find your hero
AmSome (x02210@1)say you might lose your mind
AmWoo (x02210@1)Hoo
AmWoo (x02210@1)Hoo
AmWoo (x02210@1)Hoo
AmWoo (x02210@1)Hoo
AmWoo (x02210@1)Hoo
AmWoo (x02210@1)Hoo
AmWoo (x02210@1)Hoo
AmWoo (x02210@1)Hoo