P1 is a female blue alien with pink strands on her head, a yellow crop top and skirt, yellow sock and black wedges.
P2 is a male astronaut wearing a white space suit with yellow stripes and a pink triangle.
The background is in space with the dancers on a floating broken part of a satellite. Some random things float around, such as bubblegum pieces, wrenches, a radio, a bottle with a binary code on it, and a sign with "Them" and "Us" on it ("them" referring to Earth and "us" referring to the aliens).
This is the second song by Love Letter on the series, after Why Oh Why.
However, this is their only song to be a cover.
Only You (And You Alone) has the lowest BPM in Just Dance history with a BPM of 77.
On the camera consoles (Xbox 360, Xbox One, and PlayStation 4), for the Classic routine, certain moves meant for the astronaut are not counted for. They are, however, counted for on the Community Remix.
Such moves are when the astronaut is behind the alien, holding her arms.