Monday night (July 21) was the inaugural Alternative Press Music Awards in Cleveland, Ohio. One of the most surprising moments of the evening was during Bring Me the Horizon vocalist Oli Sykes' Album of the Year acceptance speech for 'Sempiternal.' Sykes shocked the crowd by revealing he has been struggling with ketamine addiction and had spent time in rehab.

Bring Me the Horizon had a banner year in 2013, receiving mass critical acclaim for 'Sempiternal' and elevating their status as one of Britain's top metal acts. However, behind the scenes, BMTH were facing some serious issues.

During Sykes' acceptance speech (seen above), the vocalist held nothing back:

“I want to say something that I never thought I’d actually talk about. Before we wrote 'Sempiternal' I was a f--king drug addict. I was addicted to a drug called ketamine; I was on it for years and I was f--ked off my head. My band wanted to kill me, my parents wanted to kill me and my f--king brother wanted to kill me; everyone wanted to kill me, everybody wanted to f--king take me to hell, but they didn't. They stood by me, they supported me through all of that s--t and we wrote 'Sempiternal' because of it. No one f--king knows, no one f--king knows this, but I went to rehab for a month, and through that time, as well as my f--king band and my family, you guys – you had no f--king idea that I was in rehab – but you were sending me letters, you were sending me texts, you were sending me f--king emails. And when I got out of that rehab I didn’t want to f--king scream anymore, I wanted to sing it from the f--king rooftops. And it’s all thanks to you, so thank you very much.”

Bring Me the Horizon's 'Sempiternal' beat a star studded group of nominees in the fan voting for album of the year, winning the award over albums from A Day To Remember, Avenged Sevenfold, Black Veil Brides, Fall Out Boy, Paramore, Touche Amore, twenty one pilots and The Wonder Years.

BMTH will be on tour with A Day to Remember and Chiodos this fall. The 'Parks & Devastation' tour kicks off Sept. 4 in Pittsburgh.