Demi Lovato, “Revamped.”

If there were any lingering questions about the commitment of Demi Lovato to their new hard rock persona, Revamped is the answer. The concept is simple enough: Lovato took a handful of existing hits and gave them a sonic transformation into hard-rocking anthems.

Think of the project as “Demi’s Version”—with power chords. Some of the material won’t come as a surprise, as Lovato has been performing the arrangements at shows in support of Holy Fvck. The added twist on the new album is that Lovato also invited an eclectic array of rockers to collaborate.

The artist has long carried a rock influence; dating back to their earliest work, but Revamped realizes that into a more direct form. The transition isn’t always a major one. “Cool For the Summer” and “Confident” already had a rock feel as pop anthems. To these songs Lovato adds a heavy dose of guitars, a powerful percussion and extra boost of energy.The bass rumbles especially hard on “Confident.”

Other songs  get a more significant makeover. Opener “Heart Attack” gets the pop-punk treatment, upping the tempo on the verses along with an urgent guitar riff. Same story on “Sorry Not Sorry,” which adds in a couple screams but features a blistering solo by Slash. The Guns ‘N Roses guitarist’s presence is a sign that Lovato is hitting the right notes—this material is even getting airplay on modern rock radio.

The album isn’t “all riffs all the time.” “Tell Me You Love Me” achieves power ballad status by fusing melodic and atmospheric verses with a guitar-driven chorus.

Whether Lovato is doing rock, pop or soul, their vocal prowess is staggering. Lovato sings high a handful of times, belting out runs and big notes when the moment calls for them. In some ways, the rock format provides more leeway for that.

Revamped’s shining star may be club anthem “Neon Lights,” a collaboration with The Maine. The new version captures the energy of the original but takes it to another level with expressive drum patterns added to the mix. Once the chorus kicks in, the driving alt-rock sound shines through. Simply put, the assignment was understood.

The album works because Lovato’s love of the genre shines. It’ earnest and enthusiastic.

“Skyscraper” offers a dramatic change of pace. Here, it’s not about nailing the hard rock, but rather a straightforward pop-rock sound. There’s an easygoing quality almost akin to Good Goo Dolls.

“La La Land” also shines with the help of shredding and pinpoint licks by Nita Strauss. The guitarist was a mainstay in Lovato’s band during the Holy Fvck tour and still joins in when she can. Strauss’ solo is tasteful yet scorching.

Another standout is “Give Your Heart a Break,” which gets a melodic boost from The Used vocalist Bert McCracken.”Don’t Forget” closes out the record with another keen mix of melodic verses and a solidly heavy chorus. While Demi Lovato has hinted this latest run of shows may be their last, Revamped could change that. These tracks lend themselves to concerts.

Follow writer Mike DeWald at Twitter.com/mike_dewald.