The former Love Island star, 26, posted a series of sizzling snaps of herself in the elegant two-piece swimwear set.
Montana's bikini boasted tie-side bottoms and a halterneck bikini top.
The reality star proudly showed off her voluptuous behind and slim pins, while also displaying her toned midriff and ample cleavage.
She styled her long blonde tresses into a half-up, half-down 'do and shielded her eyes with orange-tinted lens shades.
Montana recently admitted her plans to make changes to her life in 2022.
Montana Brown told: 'My New Year's resolutions are to be more disciplined with the things I have to do but don't want to, carve out more time for things that I love doing like playing netball, get back into playing piano and golf.
'I have some other pretty exciting goals for this year but gotta keep you on your toes! Happy new year everyone. Sending everyone big big love and just a tip, no dream is too big!'
Montana is in a relationship with beau Mark O'Connor, and the pair love to travel to exotic locations together.
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