Most difficult song in Rock Band

Most difficult song in Rock Band
Who
“Run to the Hills”
When
01 January 0001
Each track in Rock Band gives a difficulty rating for each of the four instruments (guitar, vocals, drums and bass). The ratings range from one to nine, with “Run to the Hills” by Iron Maiden the only song to rate a terrifying “nine” for every instrument. Guinness World Records Gamers' Edition 2009.