Harris turned up on the pair's 'Verzuz' battle, where they also addressed their past beef.
The singer tells ET that she will always be by Vanessa's side following her husband and daughter's tragic death.
Both Monica and Brandy are reuniting for 'Verzuz' in a friendly battle of music dominance, on Monday, Aug. 31.
The singer explains how 'Boy Is Mine' sparked a feud between the two singers and how important it is to put it behind them.
