"What's It Gonna Be?!" is a song by American rapper Busta Rhymes featuring American singer Janet Jackson. It was released as the fourth and last single from Rhymes' third studio album Extinction Level Event: The Final World Front on March 9, 1999, by Flipmode Entertainment and Elektra Records. The song was written by Rhymes, Antoinette Roberson and its producer Darrell "Delite" Allamby. 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.