Bell Biv DeVoe
Then: New Edition took a hiatus in 1990, but group members Ricky Bell, Michael Bivins and Ronnie DeVoe wanted to keep working together. So they formed Bell Biv Devoe – sort of like how the Tom Tom Club was created from inside Talking Heads – and released the New Jack Swing classic Poison in 1990. The title track and "Do Me!" were huge hits, but in 1993 the followed it up with Hootie Mack and failed to score another hit. They returned to the mothership of New Edition soon after that, as did Bobby Brown, who was having trouble with his own solo career at that point.
Now: Bell Biv DeVoe tried one more time in 2001 with their third album BBD, but by that point virtually nobody on the planet cared. It sank like a stone, and they once again focused their attention on New Edition projects. They haven't abandoned the catalog though, and at every New Edition show to this day they bust out "Poison" and Do Me!" They even played those two songs with The Roots on a 2011 episode of Late Night With Jimmy Fallon.