Invincible Uke tab by Hedley (Baritone Chords)

Verses : Bb-F-Dm-C (x2)
Pre-chorus : Bb-F-Dm-C (x2)
Chorus : Bb-F-Dm-C (x2)

So, basically, it just repeats throughout the whole song. 
Put your capo on the first fret, but If you dont have one, no worries. It will still sound good without it!