You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "frozen who sings let it go in the movie?" whose answer is Queen Elsa.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who sings let it go in frozen
Useful Output:

Doc 1: The song was performed by American actress and singer Idina Menzel, who provided the voice for the character Elsa in the film. Menzel is a
Doc 2: Idina Menzel - The Making of 'Let It Go' (from Disney's 'Frozen') (Vevo Footnotes) · Try YouTube Kids.
Doc 3: Comments70K · Into the Unknown | LIVE Academy Awards (Lyrics & Translation) · Idina Menzel — Let It Go (Frozen) — live at The Fox Theater (4K).
Doc 4: Idina Menzel singing “Let it Go” from Frozen (2013).. · Behind the scenes voices from The Lion King (1994).. · Off to work, and today is my 8th
Doc 5: Idina Menzel - Let It Go (from "Frozen").