The incident occurred in Iceland on April 1st.
The rapper left the venue without performing.
The two were later charged with battery assault in Atlanta.
The festival has also confirmed all-gender bathrooms.
The Queen rapper has been spotted cozying up with Kenneth Petty, who previoiusly served time for attempted rape and manslaughter.
“He grabbed both my arms and screamed in my face.”
The Oasis singer reportedly got into a fight with his girlfriend, Debbie Gwyther, at a London restaurant over the summer.
A British tabloid claimed Gallagher grabbed Gwyther by the throat during an argument at a London nightclub.