Musically, "Fearless" blends elements of R&B, pop, and hip-hop, reflecting Sullivan's diverse influences and eclectic taste. The album features production from notable producers like The-Dream, Tricky Stewart, and Jazze Phaes, who contribute to the record's sleek, polished sound. Sullivan's vocal performance is equally impressive, showcasing her impressive range and expressiveness. From the soulful, Aretha-inspired vocals on "In My Head" to the playful, hip-hop-inflected delivery on "Bust Your Windows", Sullivan's voice is a constant source of fascination and delight.