DEMI Lovato sure knows how to turn up the heat.

bkThe Heart Attack singer wowed fans by flashing her very buxom cleavage in a saucy new snap.

btAfter stunning with her Demi Lovato Halloween transformation, the 25-year-old sent temperatures soaring in the sizzling selfie.

ffThe Demi Lovato Instagram reveal saw the babe staring seductively into the camera as she let her braless assets take centre-stage.

frDemi’s chest just about stayed in her silk blue top, which was slashed right down the front.

Her cleavage was even more emphasised, thanks to her long tousled locks, which were draped over her assets.

Demi teamed her flesh-flashing ensemble with deep smoky eye makeup and on-point highlight.

Her exposé caused a meltdown amongst fans, with it racking up more than 1.3 million likes.

One exclaimed: “Cleavage missile,” while another added “You’re a queen baby.”

A third gushed: “Oh Demi, you are so gorgeous.”

Demi also wowed fans recently as she posed in some sexy lingerie.

As well as her looks, the star has been killing it with her Demi Lovato songs this year.

The first single from her sixth album, Sorry Not Sorry, became her highest charting song in New Zealand and the United States at number six.

Fans also got to know the beauty better in her Demi Lovato documentary, Simply Complicated, which was released back in October.

Those who want to see her live can currently get tickets to the Demi Lovato tour.

Her next shows are coming up in Paris, France, before she heads back to the US for a string of dates.