Grammy-winning singer Beyonce packed on 15 pounds to play Etta James in the new film "Cadillac Records," and loved every minute of it, People magazine reported.

“I gained almost 15 pounds to play the role,” Beyonce, 27, reportedly told InStyle magazine. “It was way easier — and tastier—than having to lose so much weight for 'Dreamgirls'”

The star, known for her self-proclaimed “Bootylicious” curves reportedly lost 20 pounds for the 2006 film.

For "Cadillac Records" however, the star was forced to gain weight — and don a platinum blonde wig — to play the voluptuous James.

According to People, the role also affected her music. She says the lyrics on her album — which comes out November 18 — are deeper than anything she has done before.

“I wasn’t mature enough or old enough, or in touch with myself enough to do this type of album. I didn’t have the guts.”

Perhaps Beyonce’s new confidence and maturity also had something to do with her recent wedding to longtime boyfriend, rapper Jay-Z.

She recently told Essence magazine on their secretive relationship: “What Jay and I have is real. It’s not about interviews or getting the right photo op. It’s real.”

Click here to read the full report from People magazine.

Click here to read more from Essence magazine.