Nicki Minaj is reportedly furious with Rihanna.
The 'Pills N Potions' hitmaker, 31, is said to be very upset with the 25-year-old singer for breaking her friend Drake's heart for the second time in May, and is planning to write a song to get back at her long-time rival.
A source told the American issue of OK! magazine: "Drake has been pretty down since Rihanna dumped him. She really broke his heart. Nicki wants to call Rihanna out on it. She's very protective of Drake."
Nicki and Rihanna have never been close, according to the insider, and the 'Starships' rapper previously admitted she would love to marry Drake in the future.
She said: "One day, I will run away with Drake and get married, but right now it's just a fantasy."
The 'Stay' singer dumped Drake, 27, last month after a series of arguments, and an insider recently claimed that the Canadian star blamed her abusive ex-boyfriend, Chris Brown, for the demise of their romance.
The source said: "Drake is convinced that Rihanna has self-esteem issues and is pushing him away because she doesn't believe in or trust true love, which isn't surprising after the crazy stuff that happened with her and Chris."
The on-off couple rekindled their relationship in February after briefly dating in 2009.