Mary-kate & Ashley Olsen — The Backwards Song Box lyrics

Ashley, what is that gizmo?
It's a backwards song box.
You take a song.
Feed it in this tube.
Turn this dial.
Press command B flat.
And out it comes, backwards!
Try some of our album.
'Double up, double up, two are in the middle, double up, double up'
'pu elbuod, pu elbuod elddim eht ni era owt, pu elbuod, pu elbuod'
Oooo I like that.
[ Lyrics from: http://www.lyricsty.com/mary-kate-ashley-olsen-the-backwards-song-box-lyrics.html ]