Kylie Jenner has made sure not to change her ways since turning 18 last week, as she continues to show off all the side boob ever on Instagram.

Oh and a tattoo.

Yep, the KUWTK star and budding entrepreneur shared some revealing snaps with fans as she holidays in St Barts with her family for the show, with one in particular showing off a tiny red inking.

A small red heart has popped up on her arm, though having seen it on both sides we can't be sure if it's real or just the work of a Sharpie.

Brb while we grab our detective hat.

Kylie has also been teaming up with sister Kendall for some snaps, as they try their best to make us feel guilty for eating that massive muffin.

Nah, definitely going to have another bite.

- By Lucy Bacon