"What's It Gonna Be?!" is the second single released by American rapper Busta Rhymes from his third studio album "" (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.