The 24-year-old rose to fame on MTV documentaries 16 & Pregnant and follow-up Teen Mom, which followed the then-teenager as she gave birth to daughter Leah.
But things went downhill for Amber, who found herself hooked on prescription pills and in a tumultuous and at times violent relationship with now ex-boyfriend Gary Shirley, the father of Leah.
Amber was arrested in 2010 on suspicion of domestic battery.
She pleaded not guilty and was released on $5,000 bail. But she was later arrested for probation violations and sentenced to rehab. Gary had custody of Leah.
Instead, she chose to enter prison for a five-year sentence. She spent 17 months behind bars before being released in November 2013 and reunited with Leah.
This week, she took to Twitter to insist she's changed her life and is in a good place now.
She told her 100,000-plus followers: "I've worked too hard on myself and my family to still get criticism 5 years later. I have changed and worked my butt off to be sober & happy."
Amber released a book in August last year called Never Too Late, which documented her childhood, rise to fame, pressures of life as a teenage mum, descent into drug taking and her time in jail and afterwards.
She appeared on Dr Phil last year, where she gave an extensive interview about why she chose to go to jail over take rehab and how she wanted to change her life.
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