Mötley Crüe co-founder and bassist Nikki Sixx will make a guest appearance on this Sunday's episode (March 20th) of American Idol. Speaking with Billboard, Sixx offered the following:

"It was a lot of fun to team up with American Idol upon the show's return to LA. After all, Mötley Crüe are also from LA, and so many amazing songwriters call Los Angeles their 'Home Sweet Home'. Because of American Idol, a lot of great, timeless, classic songs have not only been re-interpreted by the next generation of talented singers but have also been re-introduced to mainstream audiences and younger generations of music fans for the last two decades. As a songwriter myself, that's something I really appreciate, so when I was invited to appear on this Sunday's episode, I did not hesitate."

A preview teaser can be viewed below.

Sixx looks back at his formative years in his new autobiography, The First 21: How I Became Nikki Sixx, revealing family secrets and the origins of his drive to succeed. He recently spoke with Classic Rock about the journey that led him to becoming who he is today. Following is an excerpt from the interview.

Q: What was it about rock’n’roll that spoke to you?

Sixx: "I remember hearing someone say, 'That heavy metal is going to turn you into a degenerate!' And I thought, 'That sounds like a pretty good path, I think I’ll take that one.' Like, 'You can have Donny and Marie, or you can have Aerosmith and the Sex Pistols.' Hmmm, let me think about this…"

Q: The book is subtitled How I Became Nikki Sixx. Do you see Nikki as a character, an alter ego? What is he?

Sixx: "No, Nikki Sixx is a breathing, living man. And Frank Feranna was a young boy. The two had a collision course in the late seventies. I really didn’t use my birth name, because of the information that was handed down to me from my mom. As a pissed-off-at-the-situation kid, I wasn’t going to take the name of my dad, who abandoned me. I think, at the moment that I legally changed my name to Nikki Sixx, I left Frank Feranna behind. But through a lot of years and having children and learning more about my own dad, it’s been a bit of a full circle.

My twenty-year-old daughter, her name is Frankie. I have another daughter called Ruby, but her middle name is Feranna. For the book, I went back and talked to all my childhood friends, ex-bandmates, I even found my first girlfriend, which was mind-blowing. We got to reminisce. And it really did remind me that Frank was a dreamer – and Nikki Sixx was his assassin."

Q: What did you want Mötley Crüe to be when you first started out?

Sixx: "We didn’t want to be like anybody else. And we didn’t care if you liked us. We all emulate, of course. That’s human nature. You take a little of this, a little of that. But you’re also doing your own thing and going by your gut. We loved the angst of punk. Whether it’s the Buzzcocks or Sex Pistols or Ramones – the list goes on – it’s just fucking great songwriting. Raw. Simple. You line that up against Black Sabbath and those big, simple riffs. And then all of a sudden you throw in some Cheap Trick on top of that – it gets really fun, y’know?"

Read the complete interview here.

About The First 21:

Nikki Sixx is one of the most respected, recognizable, and entrepreneurial icons in the music industry. As the founder of Mötley Crüe, who is now in his twenty-first year of sobriety, Sixx is incredibly passionate about his craft and wonderfully open about his life in rock and roll, and as a person of the world. Born Franklin Carlton Feranna on December 11, 1958, young Frankie was abandoned by his father and partly raised by his mother, a woman who was ahead of her time but deeply troubled. Frankie ended up living with his grandparents, bouncing from farm to farm and state to state. He was an all-American kid—hunting, fishing, chasing girls, and playing football—but underneath it all, there was a burning desire for more, and that more was music. He eventually took a Greyhound bound for Hollywood.

In Los Angeles, Frank lived with his aunt and his uncle—the president of Capitol Records—for a short time. But there was no easy path to the top. He was soon on his own. There were dead-end jobs: dipping circuit boards, clerking at liquor and record stores, selling used light bulbs, and hustling to survive. But at night, Frank honed his craft, joining Sister, a band formed by fellow hard-rock veteran Blackie Lawless, and formed a group of his own: London, the precursor of Mötley Crüe. Turning down an offer to join Randy Rhoads’ band, Frank changed his name to Nikki London, Nikki Nine, and, finally, Nikki Sixx. Like Huck Finn with a stolen guitar, he had a vision: a group that combined punk, glam, and hard rock into the biggest, most theatrical and irresistible package the world had ever seen. With hard work, passion, and some luck, the vision manifested in reality—and this is a profound true story finding identity, of how Frank Feranna became Nikki Sixx. It's also a road map to the ways you can overcome anything, and achieve all of your goals, if only you put your mind to it.