Ashlee Simpson has more than just a great body to be excited about, she tells Shape. She’s also engaged.

"Engaged life is fantastic. We are having a blast and are definitely thrilled."

Just in time for summer 2008, she talks to Shape magazine about finding the self confidence to put on a bikini.

Ashlee Simpson has seen her name splashed in the tabloids over the years for various reasons: her weight, her romantic relationships, did she or didn't she have a nose job? But the cheerful 23-year-old singer doesn't let gossip bother her. "This last year has been about finding strength within myself not looking to others for it."

Over the past year, Ashlee's seen a real change in her body. "I started working out more, which really helped me tone up," she says. She ramped up her workout routines with L.A. celebrity trainer Mike Alexander. With two or three one-hour sessions per week, Ashlee is achieving her goal of having a powerful yet feminine body. "Exercising makes me feel stronger and sexier," she says. "It just makes my whole day better. I have more energy to perform, my head is clearer which helps me write my lyrics and I sleep better. What more can you ask for?"

While her sister, Jessica, is known for wearing curve-revealing outfits, Ashlee Simpson's style has been a more covered-up rocker look. Who knew the hoodies and baggy cargo pants were hiding this body?!

Want to get Ashlee’s rocking body? Check out her workout routines that you can actually do at home.