Hot, hotter, hottest...the fourth instalment of Miss Universe contestants makes the mercury levels rise even higher! Don't forget to vote for your favourite contestant. 

PART I Photos: The world's most beautiful women 

PART II More Photos: The world's most beautiful women

PART III High heels and bikinis: The world's most beautiful women

Presenting Round Four of the Miss Universe 2015 contestants line-up. 

These gorgeous women know how to flaunt their bods in bikinis as they soak up the sun in Las Vegas.

Here are more pictures of the contestants' swimwear photo shoot. 

Miss Malaysia

Name: Vanessa Tevi Kumares

Age: 24

Height: 5'7"

Photograph: Courtesy Darren Decker/The Miss Universe Organisation

Miss Mauritius 

Name: Sheetal Khadun

Age: 26

Height: 5'7"

Photograph: Courtesy Darren Decker/The Miss Universe Organisation

Miss Mexico 

Name:Wendy Esparza

Age: 24

Height: 5'8"

Photograph: Courtesy Richard D Salyer/The Miss Universe Organisation 

Miss Montenegro

Name: Maja Cukic

Age: 20

Height: 6'

Photograph: Courtesy Darren Decker/The Miss Universe Organisation

Miss Myanmar 

Name: May Barani Thaw

Age: 25

Height: 5'7"

Photograph: Courtesy Darren Decker/The Miss Universe Organisation

Miss New Zealand

Name: Samantha McClung

Age: 20

Height: 5'10"

Photograph: Courtesy Darren Decker/The Miss Universe Organisation

Miss Nicaragua
 

Name: Daniela Torres 

Age:  25

Height: 5'7"

Photograph: Courtesy Darren Decker/The Miss Universe Organisation

Miss Nigeria 

Name: Debbie Collins

Age: 23

Height: 5'8"

Photograph: Courtesy Darren Decker/The Miss Universe Organisation

Miss Norway

Name: Martine Rodseth

Age: 24 

Height: 5'6"

Photograph: Courtesy Darren Decker/The Miss Universe Organisation

Miss Panama

Name: Gladys Brandao Amaya

Age: 24

Height: 5'5"

Photograph: Courtesy Darren Decker/The Miss Universe Organisation

Miss Paraguay

Name: Myriam Arevalos

Age: 22

Height: 5'10"

Photograph: Courtesy Darren Decker/The Miss Universe Organisation

Miss Poland

Name: Weronika Szmajdzinska

Age: 21

Height: 5'9"

Photograph: Courtesy Darren Decker/The Miss Universe Organisation

Take the poll given below and let us know which of these Miss Universe beauties do you think is the best!

PART I Photos: The world's most beautiful women 

PART II More Photos: The world's most beautiful women

PART III High heels and bikinis: The world's most beautiful women