Pink owes her rocking body to a hardcore work-out video - she was determined to master the P90X, which triathletes use to stay superfit, after struggling to keep up with her sister-in-law.
The Trouble singer also insisted on taking time out between shows on her recent tour to push her body through gruelling fitness rituals.
She tells Women's Health magazine, "My brother and his wife are both in the Air Force (and) they do marathons and triathlons. I went to visit (and) I couldn't keep up with her - and she'd just had her first baby four weeks before.
"I was like, 'This is bulls**t! I will perfect this thing (P90X).'
"So usually, I wake up and do an hour of cardio, then an hour of P90X or yoga... I do that six days a week."