Well, we'll be damned.
An insider told Life & Style:
[Image via WENN.]
We can't help but think she didn't just choose to perform this because of her album's re-release!
The lyrics say it all!
Check out Katy Perry debuting her brand new single, Part Of Me, on stage at the 54th Grammy Awards (above)!
She has never looked and sounded better!
One of our favorites of the night!