Ariana Grande-Butera is an American singer, songwriter, and actress. Regarded as a pop icon and an influential figure in popular music, she is noted for her four-octave vocal range and her signature use of the whistle register. Grande has received numerous accolades throughout her career, including two Grammy Awards, one Brit Award, two Billboard Music Awards, three American Music Awards, nine MTV Video Music Awards, and 36 Guinness World Records. Rolling Stone named her one of the greatest vocalists of all time.

The whistle register is the highest register of the human voice, lying above the modal register and falsetto register. This register has a specific physiological production that is different from the other registers and is so called because the timbre of the notes that are produced from this register is similar to that of a whistle.