71-year-old cancer patient Peter Johngren goes by the nickname "Senior Biebs" thanks to his tween-like obsession with 18-year-old pop star Justin Bieber.
The New York grandfather, who is battling prostate cancer, says the Bieb's music has "restored his faith in humanity" and given him a reason to stay positive.
"[Justin is] so full of life that it somehow counters my thoughts of death," Peter told Canada.com.
"While I may have one foot out the door, Justin has just entered the room and it's a reminder of how exciting and precious life is."
Peter owns enough Bieber merchandise to make any teenage girl green with envy, including T-shirts, CDs, collectors' edition magazines, Justin's autobiography, the documentary Never Say Never, print-outs of reviews and articles he found online, and ticket stubs from the time he and his wife Jane saw Bieber perform in Albany ("It was unbelievably terrific," he says).
Peter even joined "the Twitter" so he could read his idol's daily updates. And his family plans to buy him a Bieber-style wig if he loses his hair to chemotherapy.
"I've been into pop music since I was a kid, and Justin is every bit as talented as Elvis," says Peter.
"I find a lot of news in general to be quite depressing. [Bieber] helps me see how great life is, and restores my faith in humanity."
Naw, hands up who thinks Justin should pay a visit to "Senior Biebs"!