Just a few days after she donned a sparkly, sky-blue gown on the subway, Mariah Carey is at it again, rocking another floor-length frock in an unexpected place -- this time, at the playground with her kids, Moroccan and Monroe.

Mimi took to Instagram yesterday (June 2), to share several photos from the outing with her 3-year-old twins -- including one of her rocking a skin-tight, mermaid-style, powder-blue dress, complete with black heels and an inexplicable fingerless black glove. (Check out the photo above.) While the outfit may not have been suitable for the park ("Sinking into the rubber mats…lol," the singer captioned the pic), that didn't stop her from spending some quality time with Dem Babies, pushing the delighted 3-year-old cuties in the swings.

So, why exactly is the iconic singer wearing such a fancy ensemble to a New York City playground? Because she is Mariah … the Elusive Chanteuse.

Check out the sweet photos of Moroccan and Monroe playing on the swings below.

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