Jessica Simpson is using the power of music to bounce back. On Friday, the musician announced her EP, Nashville Canyon: Part 1, which she wrote as she split from her husband Eric Johnson. She also released its first single,

Jessica Simpson says Eric Johnson "will always be" part of her life after she announced their separation last month. The singer, who is releasing her new music this week, reflected on her former relationship with Johnson in an exclusive interview with People in this week's issue, and opened up about how music has healed her.

"He's still very much a part of my life and will always be," the singer-songwriter tells PEOPLE Jessica Simpson’s first single, "Use My Heart Against Me," drops from her new EP: Nashville Canyon: Part 1 - this week — just a month after announcing the end of her 10-year marriage to Eric Johnson,