Blackstreet is an American R&B group formed in 1991, known for their smooth harmonies and catchy melodies. The original lineup included members Teddy Riley, Chauncey Black, Dave Hollister, and Johnny Gill. They gained popularity in the 1990s with hits like "No Diggity" and "Before I Let You Go." The group is recognized for blending traditional R&B with hip-hop influences, contributing to the genre's evolution. Over the years, Blackstreet has experienced lineup changes and reunions, but their music continues to resonate with fans, showcasing their lasting impact on the R&B scene.