Novelty/viral acts with no real cult following that suddenly and inexplicably returned many years later

The big one is 'I Like To Move It Move It' which is now a staple at all kids' parties thanks to Madagascar.

Jimmy Nail had one hit in 1985 with a version of "Love Don't Live Here Anymore", the returned seven years later with "Ain't No Doubt".

Second time around, he'd stick around for a few more hits

a) Not a novelty/viral act
b) Stuck around the first time to release an album the following year, and singles from it
c) Had a strong mainstream following from his day job starring in, creating and writing popular prime-time television