Pomplamoose is Nataly Dawn and Jack Conte and they make VideoSongs.
A VideoSong is a new Medium with two rules:
1. What you see is what you hear (no lip-syncing for instruments or voice).
2. If you hear it, at some point you see it (no hidden sounds).
And its awesome!
Single Ladies - Beyonce
Other songs to check out:
SEPTEMBER!!! by Earth Wind and Fire
My Favorite Things from The Sound of Music
