The last song was "In Threes" by As it Is (collaborated with two others, who I also would've taken). No one guessed it correctly.
Edit: Neph has guessed it correctly!
Next:
Now the pale morning sings
Of forgotten things
She plays a tune for those who wish to overlook
The fact that they've been blindly deceived
By those who preach and pray and teach
For she falls short and the night explodes in laughter
(Good luck :)