Credit: Jason Merritt/Getty Images Photo: Demi Lovato Attends the Hollywood Reporter Women in Entertainment Breakfast on December 11, 2013

Demi Lovato’s sick and tired of the haters criticizing her music, her weight, and pretty much everything else about her life, and in 2014, she’s officially not having it.

“Haters can only bother you if you aren’t doing anything to prove them wrong,” Demi tweeted Saturday. “I can’t sing? I’m singing on the treadmill and practicing my ass off. You think I’m fat? I’m already in the gym!!!!! You think I’m irrelevant? WATCH THA F*** OUT!”

“2014 I’m GOING IN with my music and touring!” she added. “Nobody’s gonna stop my grind… LET’S DO THIS LOVATICS! #PUMPED.”

Maybe Demi received a pep talk from pals Taylor Swift and Selena Gomez during their FaceTime call, which happened earlier that same night. There’s nothing like your female friends fueling you up with girl power to inspire you to jump headfirst into whatever the future brings!

2014 will definitely be a big year for Demi — she’s given up her X Factor gig in favor of “[dedicating] it entirely to music, touring, and making a new album.”

“I have a lot of stuff planned,” Demi’s said of the upcoming new year. “I’m really excited to put on a show that I’ve never really done before. It’s going to be awesome.”

We’re glad to see Demi’s ready to kick butt and take names — 2014 is your year, girl!

Source: Twitter