Ariana Grande-Butera, a 23-year-old American singer and actress, has signed a deal with Coca-Cola to be their new global brand ambassador for Diet Coke. She was chosen for her amazing vocal range, outstanding personality, and success as a popular music artist. Grande-Butera began her career performing on Broadway at age 4 and was discovered at age 10. She is known for roles on Victorious and Scream Queens and has received critical acclaim for her four-octave vocal range.