The news for the Zappa Plays Zappa tour is that Ray White will join the band.
This is how Dweezil puts it on www.zappa.com:
"I am extremely excited to be able to present some new songs to you in our setlist this year, aided by the talents of our special guest vocalist, Ray White. I have personally always been a huge fan of the sound of his voice. Hearing him sing "Illinois Enema Bandit" and "Doreen" at rehearsals has been a lot of fun. But hearing him on other songs I've never heard him sing has been even more fun. I'm sure you all will agree when you get your chance to hear him for yourself."
The two shows in the Netherlands will be on sale on June 2. The tickets for Lund and Stockholm will be available on June 4.