Many more pics of Kris & Katy can be found at KrisAllenGallery's Idol Finale page.
Season 8 semifinalist Casey Carlson was at the after-party, and shared these pics of Kris and Katy on her Facebook:
Here are a couple paparazzi videos of the two leaving the after-party:
They show up at about :12 of this video.
And, Katy popped into Kris's interview on the red carpet with Jim Cantiello of MTV News, for just a second. Check it out here:
They show up at about :45 of the video.
Katy accompanied Kris to Washington, D.C., where he will perform in the PBS Memorial Day Concert on Sunday, May 29. He tweeted this pic of their group at the FDR Monument: