01/21/2014 10:54 EST | Updated 01/25/2014 04:01 EST

Paulina Gretzky's Clothes Are Two Sizes Too Small For Her (PHOTOS)

Could the reason why Paulina Gretzky wears such tiny bikinis is because she (gasp!) doesn't know what size she is?

We're asking this question because Wayne Gretzky's daughter posted a new Instagram photo on Monday sporting a top that looks about two sizes too small for the lean singer-in-training.

Posing with fiancé Dustin Johnson in front of a beach at night, the leggy Maxim cover girl looked gorgeous, natch, in black leggings, a revealing long-sleeve top that showed off her toned tummy and a tan zip-up vest (no No. 99 tattoo to be seen!).

Looking tanned and well-rested, the 25-year-old is no doubt taking a break after filming a commercial for TaylorMade Golf and practicing her golf swing.

In between all this work and subsequent vacations, we hope the NHL heiress is finding time to plan her upcoming wedding, which is reportedly set for this fall. We can't wait to see her wedding dress!

Also on HuffPost

Photo gallery Paulina Gretzky See Gallery