I stick Britney Spears in a room full of mirrors
So she gets fifty years of bad luck

from Redman (Ft. Eminem) – Off the Wall Lyrics on Rap Genius

According to superstition, anyone who breaks a mirror will suffer seven years of bad luck. Em is inferring that Brit is so ugly that she’ll cause all of the mirrors (slightly over seven of them?) to break

Also, note the connection between the Mouseketeers, and Britney Spears, who was in the Mickey Mouse Club.

To help improve the meaning of these lyrics, visit "Off the Wall" by Redman (Ft. Eminem) Lyrics and leave a comment on the lyrics box