By Debbie Emery - Breaking Celebrity News Reporter

Until last week, Fiona Apple was best known for her Grammy-award winning music career, but now the singer's health and legal problems are at the forefront of her fans' attention.

Apple looked sickly skinny when she performed at a concert in New Orleans on Tuesday night, and her emaciated appearance and recent drug arrest have sparked concern among health experts that she may be struggling to deal with the stress in her life, Breaking Celebrity News is exclusively reporting.

As we previously reported, the Every Single Night star was busted for marijuana possession on September 19 when it was found on her tour bus during a routine check at a border stop in the Texas town of Sierra Blanca.

While the 35-year-old spoke of drinking “marijuana-laced lemonade” and smoking pot with writer Dan Lee earlier this year, her shockingly thin figure doesn't look typical of a stoner, nutritionist Dr. Fred Pescatore, who has not treated the singer, told Breaking Celebrity News in an exclusive interview.

"She does look gaunt and pot is usually not the only culprit in that situation,