Chris Brown, Bryson Tiller, and Usher are American R&B and pop-influenced vocalists and performers known for blending contemporary R&B with elements of hip hop, pop, and dance. Usher, emerging in the 1990s, helped define mainstream R&B with polished vocals, smooth balladry and uptempo club tracks; his work emphasizes choreography and showmanship. Chris Brown, active from the mid-2000s, is noted for his versatile singing and high-energy dance-oriented R&B that incorporates pop and hip-hop production. Bryson Tiller, who rose to prominence in the 2010s, is associated with alternative R&B and trap-soul, characterized by moody, atmospheric production and a blend of singing and rap-influenced phrasing. All three have focused on vocal performance, contemporary production, and crossover appeal in popular music.