Answer: Run DMC
More information: Aerosmith and Run DMC's 1986 hit "Walk This Way" is considered to be the song which officially introduced White audiences to rap music, which is one of the reasons why both groups currently reside in the Rock and Roll Hall of Fame.
Answer: Lady Gaga
More information: After being impressed with her skills in managing his eldest son, Zachary, Elton John also named Lady Gaga the godmother of the younger, Elijah.
More information: Formed in California in 1981, Metallica's timelessness is manifest in the band producing an album, "Hardwired… to Self-Destruct", which debuted at number-one on the Billboard 200 approximately 35 years later and was their sixth-consecutive album to do so.
Answer: Thriller - Michael Jackson
Answer: Paul McCartney
More information: The globally-popular Paul McCartney closed out the opening ceremony of the 2012 Summer Olympics, reportedly only collecting $1.57 for his services.
Answer: Ryan Gosling
More information: Considering the success he has achieved as a leading male actor in Hollywood, it is unlikely the Ryan Gosling - who is reputed to be a better vocalist than even Justin Timberlake - regretted his decision not to join the Backstreet Boys.
Answer: Sinead O'Connor
More information: While appearing on sketch-comedy show Saturday Night Live in October of 1992, Sinead O'Connor made international headlines after ripping up a picture of Pope John Paul II and other actions to disgrace the global figure.
Answer: Bunny Wailer
More information: Neville "Bunny Wailer" Livingston's songwriting skills extend beyond just reggae, as he also penned the hit American dance song "Electric Boogie".
More information: Queen's 1984 song "Radio Ga Ga", about the rising dominance of television over radio, is where Stefani Germanotta, aka Lady Gaga, derived her stage name from.