"Turn It Up (remix)/Fire It Up" is a hit single by Busta Rhymes released in 1998. The original version of the song first appeared as the seventh track on When Disaster Strikes, but it was the remix that was released as a single. The remix sampled the theme from the 1980s TV series Knight Rider and became one of Busta's biggest hit, peaking at No. 10 on the Billboard Hot 100 and earning a gold certification for sales of 500,000 copies on May 21, 1998. The song was originally exclusive to the single, but it replaced "Survival Hungry" as the third track on the second pressing of When Disaster Strikes.