Etheridge "having a blast" on Broadway

Melissa Etheridge has said that she is "having a blast" preparing for her performance on Broadway next month.

The rocker - who was announced last week as a guest star for a five-day stint in Green Day's American Idiot musical - admitted that she has struggled to adjust to the role but is looking forward to appearing live on stage.

"It's been crazy. Oh my God, it's so fun, though," she told The Huffington Post.

"I'm having a blast. I'm so outside of my comfort zone and I'm, like, living out high school fantasies."

She continued: "To get up there on stage without a guitar in front of me is the first sort of fear barrier I had to get through.

"I never had to use that part of my brain [as I do with choreography] – singing and then moving at the same time with a lot of other people. If you mess up, you're gonna get trampled."

Etheridge will appear in American Idiot from February 1 to February 5.