As provided in her contract, Wood prerecorded her songs and allowed the production team to decide whether to use her voice. She found the songs challenging, but was allowed to film her scenes lip-synching to her own vocals and was led to believe that these versions would be used, although music supervisors Saul Chaplin and Johnny Green had already decided to use Marni Nixon's voice. Wood's singing voice is only heard during the reprise of the song "Somewhere" when Tony dies. Though Nixon had recorded the songs in the same orchestra sessions as Wood, she had to re-record them to synch with Wood's filmed performances. Even the one song for which Wood had lip-synched to Nixon's voice, "One Hand, One Heart", had to be recorded again because Wood's lip-synching was unsatisfactory. When Marni Nixon learned that she had not signed a contract for participating in the recording and demanded a percentage of the LP record, she was told that all percentages had been allocated. Bernstein gave her 0.25% of his album royalties. This set a precedent for all future "ghost singers".