Luisa, 25, took a photo of herself as she laid on a sun lounger in the scorching heat while wearing a peach two-piece with a flowery top.
Sharing it with her followers on Twitter, Luisa commented: "Selfie poolside #vegas only 119f today - melting ☀☀☀ all the staff keep saying 'keep hydrated!'"
Apprentice candidate Luisa jetted out to Vegas with her pal last week, and it seems she can't get enough of the heat.
The mum-of-one also shared another picture, which shows herself and her friend standing in the pool with the Paris Las Vegas Hotel's Eiffel Tower behind them.
Alongside it, she admitted: "Me and my bestie (after my outfit change because someone had same bikini on!)." Oops!