A Definite Ranking of Demi Lovato's Best 2015 Onstage Outfits — From Least to Most Naked

Demi opted for a red leather business-appropriate suit to sing the national anthem at one of the World Series games, only showing skin below the knees.

Nakedness Level: 0

Demi chose an army-green sleeveless dress to present her new tour with Nick Jonas. We can see arms and a bit of thighs but not much more.

Nakedness Level: 1

In a printed crop-top-and-skirt combo, Demi sang for a small group of fans at a Meet the Musician event in New York City. She looks cute, but even with a sliver of skin between top and skirt, this look scored low in nakedness.

Nakedness Level: 1.5

In October, Demi surprised fans with an impromptu concert in Times Square, singing without a microphone and showing off her impressive pipes. Yes, there's a long coat, but we can see a little more of Demi's now-famous ripped tummy.

Nakedness Level:: 2

After months of being cool for the Summer, in late October, Demi started covering up for the Fall. There's a sexy cutout in this jumpsuit, though! We're calling it understatedly flirty.

Nakedness Level: 2.5

To promote her new album, Confident, Demi jetted to Australia and brought a suitcase of hot outfits with her. We see short shorts, but there are no see-through tops.

Nakedness Level: 3

In a cute leather outfit, Demi slayed a cover of Adele's "Hello." The top might have a high neckline, but the supershort skirt makes up for the lack of upper-body skin exposed.

Nakedness Level: 3.5

Before her official MTV Video Music Awards performance, Demi hit the stage at a benefit event in her favorite leather shorts and a loose crop top. It might not be formfitting, but we spot more skin around her waist for at least half a point more in nakedness.

Nakedness Level: 3.5

Demi chose shorter shorts and a tighter top to perform in June. We can see more of her curves and her legs.

Nakedness Level: 4

The singer's crop top got shorter to perform at a charity event in September.

Nakedness Level: 4.5

Demi left behind her over-the-knee shoes to show off a little more leg in combat boots. More leg, more naked.

Nakedness Level: 4.5

What happens in Vegas is Demi brings out the leotard, jumping a few steps forward in our nakedness ranking.

Nakedness Level: 5.5

For her steamy performance of "Cool For the Summer," Demi chose a leotard with cutouts. Cutouts!

Nakedness Level: 6

The look Demi wore for this performance combines all the best from previous outfits in this list: cutouts, a crop top, short shorts. Extra points for Demi!

Nakedness Level: 7

A bikini top and mesh t-shirt replace Demi's trusty crop tops. And she wore this for a morning concert!

Nakedness Level: 8

Graduating from a bikini top with a "shirt" over it to a one-piece swimsuit, Demi takes her nakedness up a notch at a pool party in Los Angeles.

Nakedness Level: 9

Skimpy bikini top that covers just what needs to be covered: check! Short shorts: check! Over-the-knee boots that let you see skin through them: check! We have a winner!

Nakedness Level: 9.5