Brandy first performed the song by herself on '' The Tonight Show '' . Following that , she and Monica first performed it together at the 1998 MTV Video Music Awards in Los Angeles at the Gibson Amphitheatre on September 10 , 1998 , an event which remains , to date , Brandy and Monica 's only television broadcast performance of the song . The pair came together a second time on December 16 , 2008 for a surprise performance at Atlanta ’s '' V103 Soul Session '' , singing it a cappella
1998 MTV Video Music Awards
1998 MTV Video Music Awards
The Boy Is Mine (song)