Need a female backing vocalist

My band and I are almost done with our album and we want to explore adding female backing vocals and maybe a lead line or two. Not on all 10 songs but a few of them. We prefer someone with an original sound, no desire to have someone who sounds like another artist. The music is rock, indie and progressive. I have melodies and harmonies written, but would be good to have someone creative who can contribute creatively.

Additional info:
The song will be released commercially. The lyrics and melody are already written. I just need a singer.. I'm looking for a female singer. I'm looking to work with a very experienced singer. I don't have a hard deadline for this. . I'm an indie artist.