UsMagazine.com said Brown, 24, made the announcement Tuesday at a press conference revealing details about the upcoming BET Awards show. Brown is to perform at next month's ceremony.
He said his posthumous duet with Aaliyah will be included on his sixth album "X," which is due out July 16.
Aaliyah died in a 2001 plane crash at the age of 22.
Notable deaths of 2014 [PHOTOS]