An initial list of artists for this year's Lotus World Music Festival (the 20th) has been posted on the Lotus website:
In addition to the artists, you'll find the dates they're scheduled to perform, links to their websites and/or videos as well. The festival runs from September 25-29 this year. I will note that there are some returning favorites as well as plenty of new faces. Also, it appears there will be a Wednesday show in addition to the usual Thursday kickoff concert.
There might be some some additional artists announced and, unfortunately, there might be some cancellations. As every year, the lineup is subject to change and is never 100% certain until "the curtain goes up."