Brandy and Monica launch The Boy Is Mine Tour, a co-headlining arena run

Brandy and Monica, two of the best-known R&B singers of the 1990s, launched The Boy Is Mine Tour as a co-headlining arena run. The tour took its name from their 1998 duet, which topped the US Billboard Hot 100 chart and became one of the defining songs of that era.

The duo had long been linked in the public mind by the song's lyrics, which portrayed two women competing over the same man, and by years of speculation about a real-life rivalry. Both artists have said in past interviews that the feud was exaggerated, and the tour presented them as friends and collaborators instead.

Shows combined each singer's solo hits with the duet and drew strong ticket demand, which led to extra dates being added. The tour mattered because it revived interest in late-1990s R&B, gave two veteran artists a major joint platform, and laid the groundwork for later plans to bring the show to a Las Vegas residency.