I've not been silly today yet, so here are a few more, the joke's in the titles

:
Grima -
Creep- Radiohead
Grima to Aragorn -
Get Your Hands off my Woman - the Darkness
Beren/Luthien -
Ever Fallen in Love With Someone (You Shouldn’t Have Fallen in Love With) - Buzzcocks
Earendil -
Ray of Light - Madonna
Frodo -
I started Something I couldn’t Finish - The Smiths (a bit mean...)
The Ring -
How to Disappear Completely - Radiohead
Goldberry -
Down by the Water - PJ Harvey
The Balrog -
Firestarter - prodigy
EDIT: and for Shelob and all her kind, what about the creepiest spider song of all time? Lullaby by the Cure? "the spider man is having me for dinner tonight".