Demi Lovato's Mother Felt Powerless to Curtail Her Daughter's Excessive Lifestyle: Source

Demi Lovato’s recentapparent overdoseshocked many, including those in her family who may have felt powerless to help her in the past.A source who was formerly in the singer’s inner circle tells PEOPLE Lovato’s mother,Dianna De La Garza, was “aware” of her struggles with substance abuse but did not feel she could address her daughter’s issues — as the singer was the one paying the bills.“Her mother’s a very sweet person who has zero — when I say zero, she has zero say,” the insider says of De La Garza’s experiences with her daughter’s previous downward spiral.

Demi Lovato's New Tattoo Is a Sweet Tribute to Her Late Dog with Ex Wilmer Valderrama

Photo: Jon Kopaloff/FilmMagic; Inset: Demi Lovato/Instagram Demi Lovatohas some new ink and it carries a very sentimental message. On Wednesday the 26-year-old singer shared a photo of her new ankle tattoo on Instagram stories, which features a drawing of her late dog’s face with the words “Buddy was here.” “Thank you @_dr_woo for the incredible portrait of my late angel buddy,” she wrote alongside the photo. “RIP @demisbuddy. I will love you and never forget you.

Demi Lovato's Overdose: 'This Is Absolutely What So Many People Feared,' Says Source

A source with knowledge ofDemi Lovato‘s sobriety issues is speaking out in the wake of the news that the star has been rushed to a Los Angeles hospital followingan apparent overdose. “This is absolutely what so many people feared would happen. She has not been sober for quite some time but more tragically, has had no interest in being sober,” a source with knowledge of the star’songoing sobriety struggle, tells PEOPLE.

Demi Lovato's Sister Madison Celebrates Singer's Birthday with Emotional Tribute on Instagram

Photo: Alberto E. Rodriguez/Getty Images Demi Lovato’syounger sister Madison De La Garzabroke her silence about thestar’s relapse and overdoseon a very special day: the singer’s 26th birthday. “Today could have been one of the worst days of my life, but instead i get to spend it thanking God, the incredible doctors, demi’s team, and everyone across the world who offered their support — without all of these people i wouldn’t have my big sister anymore,” the 16-year-old actress wrote Monday in a heartfelt tribute to Lovato.

Demi Lovato's Sister Madison De La Garza Says She Got Sober to Save Relationship with Her Mom

Demi Lovato and Madison De La Garza.Photo: John Sciulli/Getty Images; Emma McIntyre/Getty ImagesMadison De La Garzais getting candid about her sobriety.Demi Lovato’s younger sister, 21, opened up about why she decided to get sober in anew interviewreleased Tuesday.“I feel free,” theDesperate Housewivesstar told E! News in the sit-down, which was recorded on March 15. “The world seems lighter and more colorful.“The actress revealed she is 248 days into her “journey of recovery” after substances were previously her “best friend.