(Cover) - EN Showbiz - Beyonc Knowles is feeling "nervous" ahead of her sell-out shows this weekend.

The singer is preparing to take to the stage in Atlantic City, marking the first time she will have performed since becoming a mother in January.

The star has posted a video charting her preparation on her website beyonce.com.

"It is exciting. I feel a little nervous," she says. "I'm enjoying being a mother so it's like going back to my old job. It is a little strange, but it's important that you don't lose yourself, still have your own passions. I'm back to work, I'm back to business."

The star is seen practicing her hit Halo and getting excited as her team come up with a new arrangement for the song.

She gets involved in everything from the set list to stage design and admits all the work has caused her sleepless nights.

Beyonc also shows off her toned physique as she practices the energetic choreography she is so famous for. The star looks svelte despite having her daughter Blue Ivy just months ago.

"I think the show has the potential of being one of the greatest shows we've done," her choreographer Frank Gatson Jr. says.

Beyonc was originally planning to perform twice in Ovation Hall at the Revel Entertainment Complex, but due to demand she added an additional two shows. (C) Cover Media