Demi Lovato knows that with fame comes little to no privacy but Wilmer Valerrrama's girlfriend doesn't mind the sacrifice if she is helping fans.

The 21-year-old singer explained that although the price of fame is at times difficult to deal with if she can inspire so many people it makes the invasion of privacy worth it.

According to E! News, during her book signing in Los Angeles for "Staying Strong: 365 Days a Year" over the weekend the songstress said, "Yeah it's been difficult."

She explained, "I'm not the type of person that loves the fame aspect of it. I would rather sacrifice my privacy to help people, not just with my music. Strictly from this point of view, from an inspirational point of view of sharing my story. I know that I have a purpose in the world."

In the past, Demi Lovato has been very open about her struggles following her stint in rehab which lead to the inspiration of her new book.

According to the press release, the book tells the story of the "Skyscraper" singer's "struggles ranging from addiction to depression, all the while on a search for self-discovery and happiness. Demi has chronicled her journey in the media, in her song lyrics and to her 17 million followers on Twitter."

In a statement "The X Factor" judge said, "I'm thrilled to have the opportunity to share this book," adding, "It is my hope that these affirmations will help readers to remain strong and hopeful, even when that seems impossible."

The "Glee" actress told Entertainment Weekly that she was nervous about being so honest with her fans. She admitted, "I'm battling with internal thoughts on how honest I should be."

She continued, "Yes, I've been very honest, but if people really knew how dark and deep my struggles got-not just with my eating disorder but with drugs and alcohol-they'd be really shocked. But I'll most likely end up saying everything. Maybe it'll help other people in the industry who are headed down the wrong path."

Do you appreciate Demi Lovato's honesty or do you think she should keep that portion of her life private? Let us know your thoughts in the comment section below.