Rihanna had an intentional nip slip while filming her "Pour It Up" video. The "Stay" singer flashed her cleavage in a see-through mesh bodysuit and donned a Marilyn Monroe wig for her new music video.

[For the photos, click HERE.]

According to Hollywood Life, Chris Brown's ex-girlfriend, 25, was so proud of the super-revealing look that she posted on-set photos on Instagram and tweeted about it.