What goes on in Vegas most certainly will NOT stay in Vegas here!
Watch it go down (below)!!!
Katy Perry and John Mayer in retro '70s clothes and wigs!
And that's just what we got as the two got their funny on for a special holiday sketch on Ellen DeGeneres' show!
While we're totes loving the style they brought, we love even more that we're getting to see John's silly side. Srsly, KatyKat brings out the best in that boy!
If you didn't think these two were cute enough together, then you're about to be sold on their adorbzie cuteness because this sketch is HIGHlarious!
Ch-ch-check out these two having a blast (above)!