Sum 41's Deryck Whibley vouches his memoir is '100%' true after ex-manager's denial that he 'groomed' and 'sexually abused' ...

Whibley recently published his memoir, 'Walking Disaster,' which alleges Sum 41's former manager groomed him at 16 ...

Deryck Whibley slammed Greig Nori's claim that Whibley was who 'initiated' a relationship after Whibley accused him of ...

In his memoir 'Walking Disaster,' Whibley accused Nori of sexual assault and grooming while the front man was a minor. Nori ...

In the book, Whibley, 44, claimed that in the band’s early days, he was groomed and sexually and verbally abused by Nori. He ...

Deryck Whibley of Sum 41 is opening about the sexual abuse he allegedly suffered during his relationship with the band's ...

Sum 41’s Deryck Whibley is issuing a challenge to Greig Nori after the Treble Charger frontman denied the singer’s claims ...

Deryck Whibley takes issue with being called a 'liar' by former manager who he claims sexually abused him after 'grooming' ...

In the short clip, Whibley said he stands by his allegations that Nori coerced him into a non-consensual sexual relationship as a teen.

Sum 41’s Deryck Whibley is calling out his former manager after he denied the abuse allegations laid out in his new book.

The Sum 41 singer makes a public challenge to his former manager to have the truth proven under oath in a court of law.