R&B is a genre of pop music with black origins characterized by soulful vocals and improvisation. Some of the most influential R&B artists include Michael Jackson, who had immense commercial success both with The Jackson 5 and as a solo artist, Stevie Wonder who recorded numerous hit songs from the 1960s to 1980s and won 22 Grammys, and Whitney Houston who dominated the 1980s and 1990s with many number-one hits and sold over 200 million records. Current leading R&B artists are Drake, the top-ranked hip hop artist on the Billboard charts who is also the most-streamed artist on Spotify, Rihanna who had her breakthrough in 2007 with her hit "Umbrella" and