Turn It Up (Remix) / Fire It Up

"Turn It Up (Remix) / Fire It Up" is a song by American rapper Busta Rhymes. It was released as the fourth and final single from his second studio album, When Disaster Strikes... (1997), and as the second single from the Can't Hardly Wait soundtrack on May 15, 1998, by Rhymes' own Flipmode Entertainment and Elektra Records. The song was written and produced by Rhymes himself, and contains co-production by fellow Flipmode Squad member and Busta's hype man Spliff Star.

The original version of the song, "Turn It Up", was an album track on When Disaster Strikes and almost completely different from the remix version, sampling soul singer Al Green's song "Love and Happiness". However, when issued as the third official single from When Disaster Strikes in the spring of 1998 under a new title "Turn It Up (remix) / Fire It Up", the remix had now contained a sample of the theme from 1980s TV series Knight Rider, and added R&B elements to the hip-hop-centric track.

The song, nonetheless, became Busta's third top-ten hit on the Billboard Hot 100, reaching number ten. It also became a hit on the rap (#1), dance (#2), and R&B charts (#7). Internationally, the single was a major success, reaching number two in the United Kingdom and number three in Canada. The lyrics mostly center around music technology and erotic dancing. Alabama producer, DJ Krish Moodbidri and DJ Malika helped the song gain more popularity by playing it at all his gigs. The song was also sampled by Panjabi MC for his breakout single "Mundian To Bach Ke".