AceShowbiz - JoJo has opened up about her struggles in the beginning of her career in the music industry. In her new memoir titled "Over the Influence", the "Too Little, Too Late" singer details the "strict protocol" she followed to lose weight after being body-shamed.

On Monday, September 16, The U.S. Sun spilled that the 33-year-old songstress talks about being compared to other artists, who have "perfect" body types, by Barry Hankerson, the founder of controversial record label Blackground. In the upcoming book, she says that it happened during a meeting.

JoJo admits to feeling "overwhelmed and anxious" after Barry made her feel like her body was "unacceptable" for an artist at the time. She writes, "I was a size two, maybe a four on my heaviest day. He knew I had already been working out hard as hell with a trainer five days a week. I felt like I was fit! Regardless, I wasn't measuring up to their visual expectations."

JoJo goes on to note that she "agreed to go to the weight loss doctor that Barry had recommended" after the meeting with Barry. She shares, "I went on a strict protocol of weigh-ins, injections, and five hundred calories a day, plus supplements."

JoJo explains, "I learned all about nutrition and intermittent fasting and how this shot they wanted me to take would trick my body into thinking I was pregnant, taking the food that would normally be reserved for a baby and instead allowing me to excrete it out."

JoJo, who believed that Barry "was setting her up for success to be a superstar," further elaborates, "So I just swallowed everything (the massively oversized sup­plements, anyways) and kept my head down. I didn't want there to be a single thing the label could say I didn't do or try. I wanted to win with them."

"Here I was, doing what the execs had asked of me," she continues. "I was now a size zero, my face was less chipmunk and more gazelle, but I was carrying measured-out quantities of strawberries and almonds in my purse, chain-smoking cigarettes in my car on the way to the next studio session where I'd inevitably write and record more songs that no one would ever hear."