Greenberg started performing publicly at an early age. In an interview she recounted her performance of Elvis Presley's "Can't Help Falling in Love With You" at age four while on a trip to St. Tropez to an audience at the Hotel Byblos. "I requested 'Can't help falling in love with you' by Elvis and the performer asked if I'd sing it. I remember being so excited." She later explained the effect of seeing the 2003 Jack Black movie School of Rock had on her musical interests, "I remember that changing my view of music completely. I started listening to AC/DC, Guns N' Roses, Red Hot Chili Peppers … and I realized how much I loved rock music." Greenberg also cites Jimi Hendrix as "one of my biggest inspirations".