Want to Define "Plunging Neckline" Without Using Words? See: Demi Lovato's Swimsuits

Demi Lovato feels damn confident in a swimsuit, and she's made that clear ten times over. The singer rarely steams up our Instagram feed without good reason. For example, she might be fighting an insecurity about her body and just want to talk about it with her fans. On that note, you can't really round up Demi's sexiest beachside moments without acknowledging the fact that the way she wears her daring designs — with her head held high and a smile on her face — is half the appeal.

Of course, the other half comes from the racy silhouettes she invests in and boldly displays like she's a friggin' angel, sent from up above. From maillots with necklines that plunge further than you thought possible, to caged bikini bottoms with so many string straps it'll make you dizzy, count down Demi's sultriest snaps below.

Demi Wore This Cheeky Thong Maillot at Coachella

The singer rocked this navy blue halter suit with plenty of sex appeal.

She Took the Plunge in Hot Pink . . .

Her swimsuit is from Mikoh.

But This Cherry Print Suit Took "Plunge" to New Depths

Her one-piece is from Solid & Striped.

Demi's Strappy Black One-Piece Was All Types of Revealing

The Knot on This Orange One-Piece Was All That Stopped Her Suit From Plunging Further

Demi Also Makes Caged Bikini Bottoms Look Sexy as Heck

Here's Another Angle of Her Strappy Little Two-Piece

Demi's Plunging Floral Suit Went Low, Low, Low

She might have posted the selfie to promote her new sunglasses line, but all we could pay attention to was that halter silhouette.

The Cutout on This Striped One-Piece Was Extra Flirty

Demi drew attention to the shape of her suit by captioning this pic: "I rewear the same 5 bathing suits over and over again if you haven't noticed."

Demi's Teal, Braided Strap Maillot Fell in Line With Her Signature Style

And She Showed Off the Cheeky Cut on a Float, Too

Don't Even Get Us Started on This Boobilicious Caged Bikini Top

But Her Caged Halter Is Plenty Sexy, Too

It highlighted Demi's toned arms.