I started with Essence Black is Back as my base.. then sponged with Sally Hansen Whirlwind White and went over it with:
OPI Yodel Me On My Cell (blue)
Joe Fresh Bumbleberries (purple)
Joe Fresh Pineapple (yellow)
Then I went over the whole thing with China Glaze Fairy Dust (holo sparkles) to give the look of a starry sparkly sky. Then I did dots for larger stars with Whirlwind White!
Even though I messed up a million times, I still like the way it turned out! I think it does look like galaxies and nebulas on my nails :D