Science is crazy!
[Image via WENN.]
Katy Perry don't have no time to be lazing around all weekend!
Don't you know who she is??
She's the fit and fabulous Katy "Sometimes Works Out On Sunday" Perry. Ha!
That's why she was spotted in her finest fitness gear, wandering the streets of El Lay on a Sunday afternoon.
After her spin class she even went on a hike in the hills!
Nothing can stop her!
It's 2013, and Katy def wants to start this year off right, by concentrating on her health and making sure fit comes first!
Way to get it, gurl!
[Image via FameFlynet Pictures.]