Grammys 2012: Katy Perry disses ex Russell Brand in front of millions

Striking a blow for irate exes everywhere, Katy Perry took the opportunity to use her live Grammy performance to deliver a diss to soon-to-be-ex-husband Russell Brand in front of millions of viewers.

Perry performed the song "Part of Me," which was apparently a track that didn't make the cut for her "Teenage Dream" album, but will be included on a yet-to-come re-release.

The song was a generic enough break-up anthem all about not having one's soul broken by a rotten ex. Apparently, though, some lyrics were rewritten post-breakup and Perry sang that new version on Sunday (Feb. 12):

"You can keep the diamond ring
It don't mean nothing anyway
In fact you can keep everything
Yeah yeah, except for me"

We get Katy's irritation with her ex, but it's kind of ironic since the two recently settled their separation agreement financials and Brand will be walking away with none of Perry's estimated $40 million fortune.