05/26/2014 10:49 EDT | Updated 05/26/2014 10:59 EDT

Deryck Whibley, Looking Scarily Thin, Thanks Fans For Support (PHOTO)

Deryck Whibley has been shocking us with photos for a while now. First there was that pic from last summer when the Sum 41 singer looked unrecognizably bloated, which was followed two weeks ago by the images he posted from the hospital after his alcoholism made his liver and kidneys "collapse."

Now Whibley, 34, has posted another photo in which he's dressed and sitting up. But while clearly feeling better, as you can tell from the words he wrote below, it's also clear the month he spent in hospital has taken a toll on his body.

hey everyone, i just wanted to thank you all so much for sending gifts and all of the compassion and support you have shown me. it really means a lot to me in this time of recovery. i will be better soon and back out on stage before you know it.

see you all soon,

deryck whibley

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