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piano
It was written by Jeanine Tesori.!
Jeanine Tesori wrote "Athena's Song", "Just One Mistake", "I Remember", and "I Will Sing" for The Little Mermaid: Ariel's Beginning.
no she didn't she probably plays something way more sophisticated. :)
The song Hallelujah in Shrek 1 was writen by Leonard Cohen and performed by John Cale.