A songwriter named Bonnie McKee (who used to live in Seattle BTW) is launching her own music career . . . and she invited a bunch of people who are famous to make cameos in her video for a song called "American Girl".
The video features more than 20 stars lip-synching the song, including Adam Lambert, Katy Perry, Kesha, Carly Rae Jepsen, Jason Derulo, Macklemore, KISS, Nicole Scherzinger, "Glee" star Jane Lynch, and Tommy Lee, who appears IN DRAG.
(Here's the video. There's a list of the stars who made cameos at the end.)