On the original version of The Boy Is Mine, Monica has more lead parts than Brandy.
She sings lead on two of the hooks all by herself.
I never realized until today. WTF?
From the start to the finish of the song Monica has 29 lead parts and Brandy has 25 lead parts.
Even on the single version, Monica has 20 lead parts and Brandy has 17 lead parts
I guess If you count the hook backgrounds that Brandy does by herself she is on the track more (the hook is meant for you to believe both girls are singing since they both feel the same about the guy and towards one another) but Monica has more lead parts. I wonder if this was strategic or if they just didn't notice.
Album version
Single version