After Kimmel poked fun at West's interview with the BBC -- in which the entertainer called himself the No.
1 rock star on the planet -- West went to Twitter to air his profane grievances (in all caps, of course).
The two later made amends with a televised sitdown. Eminem set it off after he claimed to have had a torrid dating relationship with singer Mariah Carey, who denied it.
Her husband, Nick Cannon, even offered to defend her honor by meeting the rapper in the ring.
In the song "Famous," West reportedly croons, "I feel like me and Taylor might still have sex. I made that bitch famous." Swift fans reacted quickly. Fox set it off in November when she appeared on Bravo's "Watch What Happens Live" and implied to host Andy Cohen that her former love interest 50 Cent might be gay.