Fall Out Boy star Pete Wentz suffers from manic depression.
The bassist-and-songwriter, who is dating Ashlee Simpson, has revealed his bipolar disorder stems from his obsessive nature.
He told Q magazine: "I have manic depression. I obsess over everything. When I am depressed, I can't get out of bed."
"But right now, it's sunny and 65 in my head, so it's OK!"
The 28-year-old musician has been on medication for his depression and anxiety problems since he was 18.
He explained: "I am on anti-anxiety medicine. The technical term is Lorazepam. I am supposed to be on antidepressants but I think it's part of my neuroses that I don't take them."
Pete revealed the trauma of his parents splitting up on his sixth birthday left him emotionally scarred and unable to express his feelings.
He said: "I turned my emotions off like a faucet. I didn't cry until I was, like, 22."
Pete's parents got back together just six months later.
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