I have a thing for (mostly sweet voiced) female vocalists:
* Emma Salokoski
. Her latest (solo) album is crap, but the ones with the Ensemble are stellar, each one better than the previous one.
* Maaya Sakamoto
. Her albums from the past ~10 years have been a bit up and down in quality, since she stopped working with composer/producer Yoko Kanno, but I still keep buying her albums no matter what
. Her albums since Medúlla have been occasionally even too weird and avantgarde, but I still adore that strange voice of hers and will buy any studio album of hers. Homogenic and Vespertine are nothing short of masterpieces.
Also I have all Portishead studio albums, Madonna's Ray Of Light, a few other J-Pop singles, and maybe something I can't remember right now. Edit: I have all Gotan Project albums too, if that's to be classified as "pop".
I'll maybe dig up some Youtube videos later on; problem is, the ones I'd like to dig up are in Finnish and Japanese so the lyrics won't make sense to most of you