Believe it or not, Donna Murphy herself has actually played The Witch(though she didn't sing this song, as it's actually an optional song theatre programs can use) in an outdoor production of Into The Woods in Central Park's Delacorte Theatre, with Amy Adams as The Baker's Wife! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-YanlCN899bY.html
hello, thank you for your kind words! And congratulations! That's a wonderful accomplishment! I would say definitely don't force those high notes, don't push for them. Keep them light and natural as possible so you don't hurt yourself! Maybe work with your voice teacher, or if you don't have one, a choir teacher, just to make sure you're singing safe! Best of luck to you! I would love to hear how the show goes!