Ariana Grande announces "The Boy Is Mine" remix featuring Brandy and Monica.

Grande expresses gratitude and disbelief at the collaboration.

She celebrates Brandy and Monica's impact on today's artists.

The original "The Boy Is Mine" hit No. 1 on Billboard charts two decades ago.

Brandy and Monica make a cameo as news anchors in Grande's "Mine" music video.

Brandy and Monica make a cameo as news anchors in Grande's "Mine" music video.

Brandy and Monica introduce the story in the music video.

The original "The Boy Is Mine" was released amid rumours of a feud between Brandy and Monica.

The duo won a Grammy for best R&B Performance in 1999 for the song.