What key does Idina Menzel Sing in for I'm not that girl?

Idina Menzel sings "I'm Not That Girl" in the key of F major. This song, from the musical "Wicked," showcases her vocal range and emotional depth as she expresses the internal conflict of unrequited love. The key contributes to the song's poignant and reflective tone, enhancing the overall impact of her performance.