Kylie Jenner has taken a break from her busy scheduling of parties and cleavage selfies to try something a bit different on her Instagram feed - a sideboob selfie.

The reality TV princess, who celebrated her 18th birthday a week ago, has been sunning herself with sister Kendall Jenner and pals in Mexico.

And she shared a snap of herself reclining on a sunlounger on her Instagram feed - serving up a generous portion of sideboob to her hungry fans.

She captioned the pic: "relax w meee"

And big sis Kendall also shared a picture from the break, apparently showing her head and shoulders silhouetted against the ocean at twilight as she swam in an infinity pool.

Both pics have received well in excess of one million likes - just to put your own social media popularity into perspective!