The band had previously pushed back a handful of gigs after Steven Tyler suffered a vocal injury
"It was bad. It was not good," the Papa Roach frontman said
“I’m heartbroken"
The Philadelphia gig was the first of their 40-date North American tour
The singer said Joe Perry called him after a fallout with Steven Tyler
The frontman's legal team have argued that books are protected speech
"Get ready and walk this way, you’re going to get the best show of our lives"
An attorney has accused him of “gaslighting” the claimant with the response
The singer's former girlfriend Julia Holcomb alleges that Tyler assaulted her when she was 16 years old
"We are so sorry"