Add it to the resume! Katy helped deliver a mystery baby in someone's living room this week!

  Katy didn't reveal the identity of the mother, but it is said to be her older sister Angela Hudson.

This good news comes on the heels of some bad news that Katy and BF John Mayer broke up this week. Sources say her upcoming "Prism World Tour" was a bone of contention between Katy and John, and that Katy made it clear that her work comes first!