The singer will hit the road in July
The attorney was sued for defamation by Dr. Luke
'True Colours' is streaming now
Pebe Selbert had accused the producer of 'intentional and negligent infliction of emotional distress'
The pair teamed up live at Coachella Festival earlier this month (April)
Singer has accused pop producer of 'mental manipulation, emotional abuse and sexual assault'
Rapper calls on Dr Luke and Sony to 'let her do her thing'
The singer joined Zedd on stage for a rendition of the DJ/producer's hit 'True Colors'.
Kurt Vile, Kacey Musgraves, Emmylou Harris and others also set to perform
Singer recently sought release from ties with Dr Luke, who she has accused of sexual assault