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Rihanna

Gustavo Caballero/Getty Images

What's a Rihanna sighting without a little scandal?

The controversy-courting pop star, who made headlines back in September when she was kicked off an Irish farm for baring too much skin during a raunchy music video shoot, wasn't shy about showing off her assets yet again when she hit Diddy's star-studded New Year's Eve bash in Miami this weekend.

Ri-Ri rocked a seemingly demure black Tom Ford long-sleeve, knee-length dress with a sexy keyhole neckline, black pointy-toe pumps and diva-red pout.

Pretty tame for this "S&M" singer's standards, right?

But the 23-year-old Barbadian beauty opted not to wear a bra and ended up flashing her pierced nipple for the cameras.

Was it an unintentional or a wardrobe malfunction?

We're guessing no, since this isn't the first time Rihanna's dared to bare her chest in public.

Way to stay, er, consistent in 2012, babe.