What doesn't kill you makes you stronger

This song is just so emotional/motivating/inspiring that makes me want to cry every time there is an awesome rendition on it.

"What doesn't kill you makes you stronger. Stand a little taller!.." Before I get lost in crooning.. Let me introduce 3 of those:

1) the original - none other than KELLY CLARKSON! She rox truly!

2) Glee cover - Complete with dance moves! Naya Rivera's voice rocks my world! Amber Riley and Heather Morris! Girlpower totally lolx

3) Sam Tsui - his singing prowess and versatility is really awesome!