"Be Natural" is a remake song recorded by South Korean girl group Red Velvet. Originally recorded and released as a single by S.E.S. in 2000, the song was re-recorded by the then-quartet Red Velvet and released by SM Entertainment as a digital single on October 13, 2014. Written and produced by SM songwriter Yoo Young-jin, the jazz-influenced R&B track was the group's second digital release in 2014, featuring a rap verse from then-SM Rookies Lee Tae-yong, who would later be the leader of South Korean boy group NCT and NCT 127. It also marked as their first single to be released under the "Velvet" concept with a drastic change to a mature, more-sultry image, and also the group's last release as a quartet.
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