"Her sobriety journey has really changed the way that she looks at things," Joanna "JoJo" Levesque tells PEOPLE after releasing her debut memoir, 'Over the Influence,' last year.

Normani, Carly Rae Jepsen and Coco Jones. Roy Rochlin/Getty There's been a lot on Joanna "JoJo" Levesque's mind. Over the past two years, the 34-year-old singer-songwriter moved to New York City ...