what is her musical contribution?
Tolkien wrote a poem "Namárië" that Galadriel sings in farewell to the departing Fellowship, and to Frodo in particular. The song is in Quenya, and "spoke of things little-known in Middle-earth,
Galadriel
On their album "Once Again", the band Barclay James Harvest featured a song called "Galadriel". It gained notability because guitarist John Lees played John Lennon's Epiphone Casino guitar on this track, an event later recounted in a song on the band's 1990 album "Welcome To The Show" titled "John Lennon's Guitar".

Hank Marvin and John Farrar wrote a song "Galadriel", recorded by Cliff Richard.
An Australian band named Galadriel released a self-titled album in 1971 which "became a highly sought-after collectors' item among European progressive rock circles".
who plays the elf lady in lord of the rings Galadriel who is this? She is a character created by J.R.R. Tolkien. She appears in 'The Lord of the Rings', 'The Silmarillion', and 'Unfinished Tales'. She was a royal Elf of both the Noldor and the Teleri, being a grandchild of both King Finwë and King Olwë. what type of character she has? She is described as being 'the mightiest and fairest of all the Elves that remained in Middle-earth' and the 'greatest of elven women'. what is she in the second age? and the "greatest of elven women". is she an angel? Not exactly - The Tolkien scholar Tom Shippey comments that Galadriel is not a fallen angel. Galadriel has been expelled from a kind of Heaven, the Deathless land of Valinor, and has been forbidden to return.
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Galadriel [SEP] Legacy in music
The poem was set to music by Donald Swann with Tolkien's assistance. The sheet music and an audio recording are part of the song-cycle of "The Road Goes Ever On". In a recording, Tolkien sings it in the style of a Gregorian chant. On their album "Once Again", the band Barclay James Harvest featured a song called "Galadriel". It gained notability because guitarist John Lees played John Lennon's Epiphone Casino guitar on this track, an event later recounted in a song on the band's 1990 album "Welcome To The Show" titled "John Lennon's Guitar". Hank Marvin and John Farrar wrote a song "Galadriel", recorded by Cliff Richard.