A former Playboy Playmate says her implants made her sick; dancer Derek Hough; parents potty-training their children in public; a young man with a family history of early-onset Alzheimer's; a hoarder finds freedom; probiotic health benefits.

Viral videos: ``Muscle Barbie,'' black facial mask; a male nurse is a viral Instagram star; a new mom is her own birth photographer; a woman sues a Mexican restaurant because she fell off its donkey statue; pain as a murder defense; Greek yogurt.