I cannot wait for the sixth album. I have a weird feeling it's going to be quite sultry and dark. It's like there's a pattern with every album she released.
Let Go had Losing Grip as its last single. Much more rock sounding compared to the previous singles. It was kind of a hint that the next album will be much more of a heavier sound, which resulted to Under My Skin.
Under My Skin had He Wasn't as its last single. Much more light, pop, catchy stuff, hinting to a different sound next era again. Then TBDT was released with the first single, Girlfriend.
TBDT had the title track as its last single (at least in some parts), and well, it's quite fun, still, leading to the first single off the next album, What The Hell, following its footsteps, although quite different to the whole TBDT era.
Goodbye Lullaby ended with Wish You Were Here, and the guitar-driven sound was carried over to HTNGU.
If GYWYL is the last single... well, hopefully...
