"Your hands on my hips
And my kiss on your lips
And I could do this for a long time
This is my heartbeat song and I'm gonna play it
Been so long I forgot how to turn it up up up up all night
Oh up up all night long" - Heartbeat Song, Kelly Clarkson

So, given Garnet's dance style involves a lot of her running her hands along her body and such it made me think that perhaps this is an extension of Ruby and Sapphire dancing together.