Working On a Chest Voice

For 'Thousand Years' I need to use my chest voice throughout the song as it is a lower range than what I'm used to. The only part I really have to use my head voice in is the pre-chorus "one step closer." which is an octave higher than the final note on the verse.

To get used to singing songs with transitions, I began to look at another Christina Perri song 'Jar Of Hearts' which is a very similar style and tempo as 'Thousand Years': 

This has actually helped me to develop my chest voice alot, and realise that maybe it doesn't sound as bad as I think it does. So it has actually boosted my confidence abit too!