Alicia Keys marked her 36th birthday yesterday by uploading a new track for fans to salivate over on Soundcloud.

What's more, the song in question - 'That's What's Up' - samples a track from Kanye West's 'Life of Pablo' album called 'Low Lights'.

That track, in turn, sampled a 2004 song by Kings of Tomorrow, so this is all getting very meta.

In any case, listen to 'That's What's Up' below: 

She also shared a home-recorded video of what is essentially a pamper session on Twitter. Well, it is her birthday after all.