Are Johnette Napolitano and Andi Deris both singers?
yes
Title: Andi Deris
Passage: Andreas "Andi" Deris (born 18 August 1964) is a German singer and songwriter, best known as the lead vocalist of power metal band Helloween, and co-founder and former lead singer of German melodic metal band Pink Cream 69.  He has an active solo career, as well as his own recording studio in Tenerife.
Title: Done by Mirrors
Passage: Done by Mirrors is the second solo album of Andi Deris, vocalist of the power metal band Helloween.  In Japan, it was released in 1999, but due to record company conflicts, had to be released in 2000 in the rest of the world.  The sound is different from Helloween, and from the previous album, "Come in from the Rain", with the dark thematic who would come in 2000 with Helloween's album "The Dark Ride".
Title: Johnette Napolitano
Passage: Johnette Napolitano (born September 22, 1957, Hollywood, Los Angeles, California) is an American singer, songwriter and bassist best known as the lead vocalist/songwriter and bassist for the alternative rock group Concrete Blonde.
Johnette Napolitano Andi Deris