Country singer Trace Adkins has entered rehab because of problems with alcohol. He's not the only star to deal with such an issue... 
In a December interview with "Access Hollywood," Demi Lovato went into detail about her dependence on drugs and alcohol. There was a time when Lovato "couldn't go 30 minutes to an hour without cocaine, and I would bring it on airplanes," she said. "I would smuggle it, basically, and just wait until everyone in first class would go to sleep, and I would do it right there." According to Lovato, her rock bottom came at 19, when she filled a soda bottle with vodka to drink at 9 a.m. "I had a moment where I was like, 'Oh, my God ... that is alcoholic behavior," she said. 
Lady Gaga revealed on the Elvis Duran radio show in November 2013 that she's been quietly dealing with an addiction to marijuana. "I had to stop (smoking pot)," the Mother Monster said. "I was addicted to it. ... Although I think it's the best drug to choose from when you're playing around and experimenting, I just want young kids to know that you actually can become addicted to it, and it's ultimately ... a form of self-medication. I was smoking 15 to 20 marijuana cigarettes a day with no tobacco." 
Elizabeth Vargas admitted having a problem with alcohol and entered a treatment program. 
Jada Pinkett-Smith reflected on her Facebook page in September 2013 that addictions plagued her in her younger years. "I had many addictions, of several kinds, to deal with my life issues," she said. 
Zac Efron quietly completed a rehab program in 2013 without the media being any wiser. When he reappeared on the red carpet for the movie "Parkland" at the Toronto International Film Festival, sources close to the actor told E! News and People magazine that he was feeling healthy and better than ever. 
"Glee" star Cory Monteith was found dead at a hotel in Vancouver on July 13. Officials gave the cause as "mixed drug toxicity, involving intravenous heroin use combined with the ingestion of alcohol." Monteith had been public about his struggle with addiction and checked into a rehab facility in late March. He told Parade magazine that he started using drugs at 13 and had entered rehab by 19. 
Matthew Perry has struggled with an addiction to prescription drugs and alcohol and landed on the cover of People magazine to discuss his road to sobriety. While he was on "Friends," he said, "it would seem like I had it all. It was actually a very lonely time for me, because I was suffering from alcoholism." 
"Sex and the City" actress Kristin Davis told Health magazine in 2008 that unlike her cocktail-loving character Charlotte York, she is a recovering alcoholic. The 48-year-old admitted that she was drinking so much, she didn't think she'd live past 30. 
Ben Affleck surprised friends when he checked into rehab for alcohol abuse in 2001, People magazine reported. 
Jamie Lee Curtis has reportedly said she was once so addicted to prescription pain medicine that she stole some from a relative to help feed the addiction. 
Jodie Sweetin, who played innocent Stephanie Tanner on "Full House," documented her drug problems in her memoir "unSweetined." A low point, she said, was using cocaine, meth and ecstasy while on tour to discuss her sobriety. 
There have been questions as to whether Bob Dylan was telling the truth when he reportedly told a journalist in 1966 that he had kicked a $25-a-day heroin habit, but, according to Rolling Stone, he had a period during his 1966 tour where he used "huge amounts" of amphetamines. 
In 2012, Black Eyed Peas singer Fergie told Oprah that her drug use proceeded from ecstasy to crystal meth. She became so paranoid she thought the FBI and SWAT teams were following her before she sought treatment. 
She was known for her wholesome role as Laura Ingalls on the television series "Little House on the Prairie," but at her worst Melissa Gilbert was covering up feelings of sadness by drinking up to more than two bottles of wine a night, the actress told More magazine. 
"Harry Potter" star Daniel Radcliffe told GQ magazine that he had his last drink in 2010. "There were a few years there when I was just so enamored with the idea of living some sort of famous person's lifestyle that really isn't suited to me." 
A year before People magazine reported that the actress checked into a substance abuse facility in 2008, Eva Mendes told reporters she "wasn't comfortable at all" and needed a cocktail to film a sex scene in 2007's "We Own the Night." 
In 2004, a then 19-year-old Kelly Osbourne reportedly entered rehab for an addiction to painkillers. "The amount of pills that was found in her bag was astounding," her father, Ozzy, said. 
Samuel L. Jackson was reportedly able to portray crack addict Gator in "Jungle Fever" so authentically because of his own struggles with drugs and alcohol. He landed the breakout role two weeks after leaving rehab. 
Kristen Johnston talked about her addiction to drugs and alcohol in her 2012 memoir "Guts" and admitted she was depressed during her time on "3rd Rock From the Sun." "And you're not supposed to be," she said. "You can't tell anybody, 'I'm so bummed you gave me an Emmy.' You can't be sad when you're being celebrated. So it was a big conflict and there's no shrink that can understand it." 
Actress Kelly Preston has said she gave up drugs and alcohol to be a better mother to her kids and better wife to John Travolta. "I don't drink anymore. I don't smoke anymore. I don't do drugs anymore. All of those come with an 'anymore.' I used to do everything and a lot of everything," she said. 
Jane Lynch wrote about her addictions to alcohol and cough syrup in her memoir "Happy Accidents." She told Access Hollywood in 2013 that she has been sober for 21 years. 
Sir Elton John told USA Today that he swore off drugs and alcohol in 1990. He said, "If I ever find myself in a situation where there are drugs, I can smell the cocaine. I can feel it in the back of my throat, that horrible feeling of taking the first hit of cocaine. And I leave." 
Country star Tim McGraw said in an interview in 2013 that he replaced drinking whiskey with working out to clean his life up. 
For those who may not remember because she has so completely turned herself around, Drew Barrymore entered rehab at the tender age of 13. Most fans were unaware that the then beloved child star partied so hard. She chronicled her early struggles in her memoir "Little Girl Lost." 
It was years after Meredith Baxter portrayed one of America's favorite moms, Elyse Keaton on "Family Ties," that she revealed that she is a recovering alcoholic. 
Backstreet Boys member A.J. McLean last checked into rehab in 2011. He had previously been treated for depression, anxiety and excessive alcohol consumption. 
Country star and "American Idol" judge Keith Urban told Oprah in 2010 that his wife Nicole Kidman and several close friends staged an intervention to help him overcome his addiction to cocaine and alcohol.
- Adkins left the "Country Cruising" cruise for rehab
- Rep: "As he faces these issues head on, we ask that his family's privacy will be respected"
- He was a pipe-fitter on an offshore rig before becoming a country music star
- Adkins has sold about 10 million albums in the past two decades
(CNN) -- Country singer Trace Adkins suffered "a setback in his battle with alcoholism" and has entered a rehab facility for help, his representative told CNN on Thursday.
Adkins, 52, was on the "Country Cruising" cruise in the Caribbean this week, according to the cruise line's website.
On Sunday as the ship sailed out of Miami to start the trip to Mexico, Adkins posted a tweet: "Up here in my suite, overlooking the pools. Behave yourselves."
His shipboard shows and the voyage were scheduled to end this weekend, but his representative confirmed to CNN that the singer is no longer on the cruise.
Drunk country star hits his impersonator "Trace has entered a treatment facility after a setback in his battle with alcoholism," his rep said. "As he faces these issues head on, we ask that his family's privacy will be respected."
Adkins, who towers above most people at 6-foot-6, worked as a pipe-fitter on an offshore drilling rig before becoming a country music star in the mid-1990s. He is a member of the Grand Ole Opry.
He's sold about 10 million albums in the past two decades. His top hits include "Ladies Love Country Boys" and "You're Gonna Miss This."
His autobiography -- "A Personal Stand: Observations and Opinions from a Freethinking Roughneck," published in 2007 -- details a long list of close calls with death and battles with personal demons.
His tough-guy image helped when he was cast as a biker in the movie "The Lincoln Lawyer" with Matthew McConaughey in 2011.
He is the father of five daughters, but told CNN's Piers Morgan in 2011 that he would never win a father of the year award because of the demands of his career keeping him from his family.
Adkins was a finalist on NBC's "Celebrity Apprentice" in 2008, but lost out to Piers Morgan.
He won the "All-star Celebrity Apprentice" last May, raising $1.7 million for his charity, the American Red Cross.
CNN's Carolyn Sung contributed to this report.
