Model exposes her breast

Emily Ratajkowski played peekaboo in a sexy black dress last night.

The Blurred Lines babe pulled down the top of her frock to flash a bit of boob in a cheeky photo posted on Instagram.

‘For @piaarrobio last night 👯#Oops,’ Emily, 23, captioned the saucy shot.

Emily‘s pal Pia Arrobio also shared the picture and admitted she’d encouraged the model to do it.

‘Stuff I make @emrata do for me. ❤️,’ Pia wrote.

The girls clearly had a fun evening and joined several other friends at Café Stella in Los Angeles.

‘Wench Party @dallasdlyn @marissajoye @emrata @alexviolante @viciously_cyd,’ Pia posted with a snap of Emily and the gang.

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Anna Francis