Home page of NDSU Extension Service - Mercer County. NDSU Extension Service in Mercer County gives local residents easy access to the resources and expertise of North Dakota State University. Through educational programs, publications, and events, extension agents deliver unbiased, research-based information to Mercer County citizens.
World records and extremes of vocal range. 1  The highest vocal range in the world, according to the Guinness Book of World Records, is that of Georgia Brown; a Brazilian female singer who produces unusually high pitches using a whistle register. Her range extends eight octaves, from G2 to G10.
In March 2011, R. Kelly was named the most successful R&B artist of the last 25 years by Billboard. Kelly has released 12 solo studio albums, and sold over 100 million records worldwide making him the most successful R&B male artist of the 1990s and also one of the best selling musical artists of all time.