The genre features a distinctive record production style, drum machine-backed rhythms, pitch corrected vocals, and a smooth, lush style of vocal arrangement. Electronic influences are becoming an increasing trend and the use of hip hop or dance-inspired beats are typical, although the roughness and grit inherent in hip hop may be reduced and smoothed out. Contemporary R&B vocalists are often known for their use of melisma, popularized by vocalists such as Michael Jackson, Stevie Wonder, Whitney Houston, Mariah Carey and Beyoncé. As of late 2000, contemporary R&B rhythms are being combined with elements of hip hop and pop music.