Brain Game: Spice Up Your Life

I heard "Spice Up Your Life" over the PA at a store recently, and even though I don't know the song well, it's been stuck in my head ever since. So what do I do to get rid of it? Make a mentalfloss.com Brain Game out of it! Enjoy today's word ladder puzzle, and good luck:

By changing one letter in each step to form English words, and leaving all other letters in their original positions, convert SPICE into GIRLS in the fewest possible steps.

S P I C E
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G I R L S