Bad Boy (Red Velvet song)

"Bad Boy" is a song by South Korean girl group Red Velvet from the reissue of their second studio album, The Perfect Red Velvet (2018). It was released by SM Entertainment on January 29, 2018. A hip hop-influenced R&B song, its lyrics were written by JQ and Moon Hee-yeon whilst music was handled by the Stereotypes, Maxx Song, Whitney Phillips and Yoo Young-jin. An English version, adapted by Phillips, was later included as a bonus track on the group's second special EP, Summer Magic on August 6, 2018.