George Michael Song Plays Explode After Death

George Michael's music has gone galactic since his death ... with streams of his solo music skyrocketing by 3,158%.

An official from Spotify tells TMZ, the top 5 songs fans have been streaming Monday are:

1. "Last Christmas"

2. "Careless Whisper"

3. "Faith"

4. "Freedom! '90"

5. "Wake Me Up Before You Go-Go"

Spotify compared Monday's numbers with the date from the same period Sunday, before Michael's death was revealed.