"What's It Gonna Be?!" is the second single released by American rapper Busta Rhymes from his third studio album E.L.E. (Extinction Level Event): The Final World Front (1999), featuring guest vocals from American singer Janet Jackson. The song was a commercial and critical success, reaching number three on the Billboard Hot 100 and the top ten of various countries. It also hit number one on the Billboard Hot Rap Tracks and Hot R&B/Hip-Hop Singles & Tracks charts, and was nominated for a Grammy Award for Best Rap Performance by a Duo or Group at the 2000 Grammy Awards. The music video, directed by Rhymes & Hype Williams, was critically lauded, and received four MTV Video Music Awards nominations at the 1999 MTV Video Music Awards. It is one of the most expensive music videos ever made. The song appears on Rhymes' compilation albums Total Devastation: The Best of Busta Rhymes and Turn It Up! The Very Best of Busta Rhymes as well as Jackson's Number Ones greatest hits album. Jackson included the song as an interlude on her Number Ones: Up Close and Personal tour and sang it for the first time on the second leg of her 2018 State of the World Tour.