If you are level 12 or higher, speak to Sohomer Sunblade in Triton Avenue for a special assignment called "Trouble Underfoot". Remember Sohomer is at the top of the set of teleporters behind Blad Raveneye. This assignment will lead you to Crab Alley where you will learn what became of the residents after their brush with fame. Be sure to pick up your rockstar outfit while you're there.
Well I hope you have crowns or a subscription, because Crab Alley is back, but it costs money! Go over the 2 bridges in Triton Avenue, in the teloporter, past that other person, in the teloporter, and talk to that guy who is standing there with a ! above his head. I hope this helps, but Professer Greyrose already kind of answered this.