The cost of that approach was being underestimated at every turn. Critics called her whispery and limited, compared her unfavorably to Whitney Houston and Mariah Carey. She kept working and released Never Say Never in 1998, an album that proved the whisper could hit when the song demanded it. The collaboration with Monica, The Boy Is Mine, became a cultural event that dominated radio for an entire summer. The song spent thirteen weeks at number one and won a Grammy. Brandy's vocal on that track is controlled and coiled, ready to strike at the right moment without oversinging.

She followed it with the sitcom Moesha, which ran for six seasons on UPN and made her a household name beyond music, proving she could carry a television show as easily as a number one single. She starred in the television film Rodgers & Hammerstein's Cinderella alongside Whitney Houston, which was watched by sixty million people and remains one of the most-watched television musicals in history. She released Full Moon in 2002 and Afrodisiac in 2004, albums that showed artistic growth while maintaining the core vocal identity that made her famous. She never became the biggest voice of her generation in terms of volume, but she became the most distinctive, and the soft, controlled approach she pioneered has become standard equipment for every R&B singer who came after her.