Final answer:
Nirvana's album Nevermind, known for its grunge sound and hit single 'Smells Like Teen Spirit', topped Michael Jackson's album Dangerous in 1991. This marked a significant shift in the music scene, bringing alternative rock to the forefront.
Step-by-step explanation:
The album that topped Michael Jackson's 1991 album Dangerous was Nevermind by Nirvana. After its release, Nirvana's Nevermind quickly grew in popularity, fueled by the success of its lead single 'Smells Like Teen Spirit.' This groundbreaking album, characterized by its grunge sound, not only surpassed Dangerous on the charts but also marked a significant shift in the music scene of the early 90s, heralding the rise of alternative rock and signaling a generational shift in musical tastes.