The trio will be presented with special awards when the ceremony takes place live from the Microsoft Theater in Los Angeles on March 14 at 8 p.m. ET.
Keys, who recently hosted the Grammys, will be receiving the Innovator Award for her contributions to pop culture and social causes.
Brooks, meanwhile, will be given the first-ever Artist of the Decade Award for his impact on the music industry. Brooks is the No. 1 selling solo artist in U.S. history with more than 148 million albums sold.
Halsey will be presented with the 2019 Fangirls Award which recognizes female artists who have pushed boundaries with their music and message. Camila Cabello received the inaugural Fan Girls Award last year.
Other nominees include Drake, Ed Sheeran, Kendrick Lamar, Post Malone and Shawn Mendes for Male Artist of the Year and 5 Seconds of Summer, Imagine Dragons, Maroon 5, Panic! At the Disco and Twenty One Pilots for Best Duo/Group of the Year.
Song of the Year will be decided between "Better Now" by Post Malone, "Girls Like You" by Maroon 5 featuring Cardi B, "God's Plan" by Drake, "Perfect" by Ed Sheeran and "The Middle" by Zedd, Maren Morris and Grey.