The titans announced their first-ever co-headlining tour, “The Boy Is Mine,” on Tuesday, paying homage to their 1998 hit of the same name. Kelly Rowland, Muni Long and recent “American Idol” winner Jamal Roberts are scheduled to appear as special guests along the road.

The tour marks a historic reunion for the duo whose 1998 duet spent a record-breaking 13 consecutive weeks at No. 1 on the Billboard Hot 100, placing them alongside Whitney Houston and Mariah Carey as artists who have commanded the chart's top spot for 13 weeks or more.

“The Boy Is Mine” is so popular that Brandy and Monica with a surprise cameo in Ariana Grande’s “the boy is mine” music video from her Grammy-nominated album “Eternal Sunshine.” They even lent their voices to the remix.