In The Number Ones, I’m reviewing every single #1 single in the history of the Billboard Hot 100, starting with the chart’s beginning, in 1958, and working my way up into the present.

Pink is saying "So What" to her recent knee injury. Powering through the pain, she finished her show and delivered a jaw-dropping encore.

Pink included her husband Carey Hart in her music video for her single 'So What.' Here's why she didn't let him hear the whole song.