Lisa Robin Kelly's mental health problems and drug abuse led to her tragic death. (Source:MGN)
Amanda Bynes is undergoing treatment for post-traumatic stress disorder. (Source: CNN)
Lark Voorhies denies any changes in her behavior, and denies being bipolar. (Source: FLICKR)
Lindsay Lohan discussed her struggles with addiction. (Source: MGN)
(RNN) - Show business brings fame and money to its stars but all too often takes a terrible toll. Studies show there may be more than the pressure of stardom to blame for celebrity crackups.
Scientists have found a link between creativity and mental illness, which would explain why actors, writers, musicians and artists so often suffer with mental problems.
Reckless or bizarre behavior of celebrities like Amanda Bynes, Lark Voorhies, Lindsay Lohan and the heartbreaking decline and death of Lisa Robin Kelly are only the most recent examples of former child stars who have hit rough patches in their lives. Some or all of them may have been experiencing psychotic episodes triggered by a mental health disorder.
Studies show one in four American adults are suffering from some type of mental health disorder.
According to Jib Fowles, author of Star Struck: Celebrity Performers and the American Public, research shows that on average, celebrities die at the age of 58, compared to an average of 72 years old for other Americans. His findings also revealed that celebrities are almost four times more likely to kill themselves than the average American.
Lisa Robin Kelly best known for her role as Laurie Foreman on That '70s Show, lost her fight with addiction recently at the age of 43. Kelly had been staying at a rehab facility in California when she passed away in her sleep, according to TMZ.
In a 2012 interview with ABC News, Kelly opened up about her struggles with substance abuse during and after she left the show.
"I had lost a baby," Kelly said. "As a result of that I lost it. I lost everything and I was abusing alcohol."
Kelly's traumatic experience caused her to suffer mentally and may have led to her tragic downfall.
According to Fox News, Amanda Bynes, a 27-year-old former child star who rose to fame as an actress on Nickelodeon, was diagnosed with post-traumatic stress disorder (PTSD), stemming from the pressures of her Hollywood career.
PTSD also plagues many people who have been in the military and those in high-stress jobs.
An insider spoke to FOX411's Pop Tarts column about Bynes' behavior.
"There are no drug problems involved, it's all mental. She has deep anger and PTSD, which tripped a psychotic episode. She is very ill, but manageable."
She has been staying at the Ventura-based psychiatric treatment facility in California since July 22, where she was taken in on an involuntary hold after starting a campfire in a stranger's driveway.
She has been arrested numerous times and has been acknowledged for her recent twitter meltdowns, where she posted verbal attacks on Drake, Rihanna and several other celebrities for no apparent reason.
According to an insider who spoke with Fox, Bynes is doing much better, but she needs to be monitored because she is on heavy anti-psychotic drugs and requires constant medical observation.
It was only months ago that Lark Voorhies' bizarre behavior was the focus of media attention. Voorhies played the role of Lisa Turtle on the hit series Saved by the Bell.
Voorhies has kept a low profile until a year ago, when her odd behavior and drastic new appearance caused a stir. Once a bizarre Yahoo! Video interview went viral, and PEOPLE reported Voorhies' strange behavior in an interview, viewers started to speculate drugs as a possible cause for her condition. Voohries refuted claims in an interview with Entertainment Tonight Online.
According toCelebuzz, Lark Voorhies' mom, Tricia Voorhies, revealed that her 39-year-old daughter had been diagnosed with bipolar disorder, and refused to be placed under professional care.
"My daughter wasn't happy that I said she was bipolar," Tricia Voorhies said. "But I was really concerned about her well being."
Tricia Voorhies also commented on Bynes' situation, finding a positive side for both troubled actresses.
"She's not the first artist to go off left field and do strange behavior. She won't be the first, and she won't be the last. That can turn around for Amanda Bynes and also for my daughter."
Lindsay Lohan, at the age of 27, is remembered for her youthful roles on the Disney channel, and for her many problems with alcohol and drugs. She was recently released from court-mandated rehab. Lohan's erratic behavior, constant run-ins with the law and psychiatric observations have played out in the media throughout her young adulthood.
Lohan sat down with Oprah Winfrey to discuss her struggles with substance abuse, after two DUIs, six arrests, seven car accidents, 14 days in jail and six trips to rehab. The full interview aired on OWN Sunday, Aug. 18. In the interview, Lohan said the stress of her chaotic family life caused her to talk with therapists, and led her to party hard and abuse alcohol, along with cocaine.
"I think I was addicted to chaos. It was a comfortable chaos for me," Lohan said.
According to studies, people who are at risk and struggling with mental illness don't feel that they fit into the normal mold of society, and may be more attracted to alternative careers like music, theater, art and literature.