Hi Aaron Mindy! from what i can see, there are two events going on in Negril at that time.

One is the "Great Escape" which is in conjunction with Carnival being celebrated through JA. There are a number of events that pay tribute to similar parties that would take place in Trinidad for Carnival - I'm hoping to participate in a couple of those as I used to live in Trini! (info here) https://www.facebook.com/greatescapeweekend.

The other is West Affair Weekend with details here http://allevents.in/Negril/WEST-AFFA...72534512857222.

Both events are a series of all inclusive parties throughout the weekend. There may be live performances but it appears to be mainly DJs. Other than that, I haven't seen anything about any big reggae acts performing. Hopefully someone local can add to this post if they are seeing any signs around town.