Okay, string together bands that covered another band's songs such that:
Band A's song covered by band B whose song was covered by band C whose song was covered by band D...
Extra points for a closed loop bigger than 3 bands.
To start:
Bob Dylan
"All along the Watchtower"
Jimi Hendrix
"Purple Haze"
The Cure
"Just like Heaven"
Dinosaur Jr.