IRINA Shayk shows her cheeky side as she parades her bum in some racy lingerie.

The Russian model – girlfriend of footie ace Cristiano Ronaldo – flashes her pearly whites in ads for Italian undies firm Intimissimi.

She also playfully tugs on her hair as she poses front-on, lifting the bottom of her silky top to unveil her pants.

Elsewhere, she dons a lacy sheer black number, again pulling on her brunette locks.

Despite flaunting plenty of skin, Irina recently insisted she's got too much class to strip off completely for Playboy.

She said: "I would never do Playboy. Yes, I am a lingerie model, but I have class. Playboy offered me so much money last year. I was like, 'No. Way.'

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