"X Factor" judge Demi Lovato recently booted two auditioning rappers off stage for lyrics about using bath salts, but there are sources who claim the singer isn't quite living the sober life herself.

A source told RadarOnline that despite a three-month stay in treatment for emotional and physical issues -- including eating disorders, self harm and drug use -- she's still "partying hard behind the scenes."

Since she left Timberline Knolls treatment center in January 2011, Lovato has become the veritable poster child for eating disorder awareness and has spoken candidly about her bipolar diagnosis and drug use, but Radar's source says, "[Lovato is] not as sober as she's leading everyone to believe and is still partying hard."

A second source also told the website that the former Disney star hasn't quit partying, but she has learned from past mistakes and knows to make sure the paparazzi don't catch her in the act.

When asked for comment, Lovato's rep denied the allegations, telling The Huffington Post in an email that the claims are "total bs."

Lovato hasn't been shy when talking about her recovery and what led her to treatment in the first place. In April she explained that her celebrity status provided her with easy access to drugs, telling Fabulous Magazine:

"[Club] promoters gave me drugs and alcohol in restaurants or clubs,” she said. “They wanted me to come back so I would be seen there. They were basically kissing my ass. Being a celebrity can be dangerous. Nobody says ‘no’."

It's been well over a year since Lovato completed treatment, and though she's admitted that she still struggles with her bulimia and cutting, she says she's completely clean and sober.

"I'm not gonna lie. I was self-medicating," she told Seventeen magazine in January. "I was doing things like drinking and using [drugs], like a lot of teens do to numb their pain. [But now] I don't drink, I don't do drugs."

This month, Lovato appears on the cover of Self magazine and further opens up about her problems.

"There were times I felt so anxious, almost like I was crawling out of my skin, that if I didn't do something physical to match the way I felt inside, I would explode. I cut myself to take my mind off that. I just didn't care what happened. I had no fear," she told the magazine.

Lovato says she's completely changed her life around, telling Self:

"I surround myself with people who make positive decisions and who have more interests than wanting to go to clubs and get wasted. My friends and I look out for each other, and I love just inviting everyone over to watch TV. I like 'Law & Order'â€"except it makes me want to go out and inspect everyone on the street to see if they're a serial killer!"

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  • 2011 Teen Choice Awards - Arrivals

    UNIVERSAL CITY, CA - AUGUST 07: Actresses/singers Demi Lovato and Selena Gomez arrive at the 2011 Teen Choice Awards held at the Gibson Amphitheatre on August 7, 2011 in Universal City, California. (Photo by Jason Merritt/Getty Images)

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    NEW YORK, NY - DECEMBER 09: Demi Lovato attends the 2011 Z100 & Coca-Cola All Access lounge at Z100's Jingle Ball 2011 pre-show at Hammerstein Ballroom on December 9, 2011 in New York City. (Photo by Slaven Vlasic/Getty Images)

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    NEW YORK, NY - DECEMBER 09: Singer Demi Lovato performs onstage during Z100's Jingle Ball 2011, presented by Aeropostale at Madison Square Garden on December 9, 2011 in New York City. (Photo by Stephen Lovekin/Getty Images)

  • The 12th Annual Latin GRAMMY Awards - Arrivals

    LAS VEGAS, NV - NOVEMBER 10: Singer/actress Demi Lovato arrives at the 12th annual Latin GRAMMY Awards at the Mandalay Bay Resort & Casino November 10, 2011 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

  • The 12th Annual Latin GRAMMY Awards - Show

    LAS VEGAS, NV - NOVEMBER 10: Singers Demi Lovato and Pablo Alboran perform onstage during the 12th annual Latin GRAMMY Awards at the Mandalay Bay Events Center on November 10, 2011 in Las Vegas, Nevada. (Photo by Kevin Winter/Getty Images for Latin Recording Academy)

  • 2011 World Series Game 5 - St Louis Cardinals v Texas Rangers

    ARLINGTON, TX - OCTOBER 24: Singer Demi Lovato walks on the field for the performance of the national anthem prior to Game Five of the MLB World Series between the St. Louis Cardinals and the Texas Rangers at Rangers Ballpark in Arlington on October 24, 2011 in Arlington, Texas. (Photo by Tom Pennington/Getty Images)

  • Z100's Jingle Ball '11 Official Kick Off Party

    NEW YORK, NY - OCTOBER 21: Singer Demi Lovato performs on stage at Z100's Jingle Ball '11 official kick off party at Aeropostale Times Square on October 21, 2011 in New York City. (Photo by D Dipasupil/Getty Images)

  • Demi Lovato Visits "Late Night With Jimmy Fallon"

    NEW YORK, NY - SEPTEMBER 20: Demi Lovato visits 'Late Night With Jimmy Fallon' at Rockefeller Center on September 20, 2011 in New York City. (Photo by Theo Wargo/Getty Images)

  • 2011 MTV Video Music Awards - Red Carpet

    LOS ANGELES, CA - AUGUST 28: Singer Justin Bieber (L) and singer Demi Lovato arrive at the 2011 MTV Video Music Awards at Nokia Theatre L.A. LIVE on August 28, 2011 in Los Angeles, California. (Photo by Christopher Polk/Getty Images)

  • 2011 VH1 Do Something Awards - Blue Carpet

    HOLLYWOOD, CA - AUGUST 14: Actress/Musician Demi Lovato arrives at the 2011 VH1 Do Something Awards at the Hollywood Palladium on August 14, 2011 in Hollywood, California. (Photo by Christopher Polk/Getty Images for VH1)

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