Beyonce is back and looking better than ever.

Beyonce made her comeback in Atlantic City over the Memorial Day weekend to a packed crowd at the new Revel Resort beachfront hotel, just five months after giving birth to baby Blue Ivy Carter.

The 30-year-old new mother proved that her maternity has not curbed her sex appeal. Beyonce flaunted a whopping 60-pound weight loss in custom-made Ralph & Russo designs, including a fringed two-piece ornamented with Swarovski crystals, according to Us Weekly. On her feet, Beyonce donned a piar of hot-pink Stewart Weitzman Mary-Janes.

Smart enough to make these millions / Strong enough to bear the children / Then get back to business, Beyonce sang to the audience in the sold-out venue, a glittering $2.4 billion, 6.3-million-square-foot beachfront spot truly fit for a queen -- Queen B, that is.

How did she lose the baby weight and manage to look nothing short of amazing?

Y'all have no idea how hard I worked! she told fans at Revel's Ovation Hall on Saturday. I had to lose 60 pounds. They had me on that treadmill. I ate lettuce!

Now tonight I'm gonna get chocolate wasted! the beautiful songstress joked.

Designers were thrilled to outfit Beyonce for her first post-baby performance in Atlantic City.

Beyonce is a true representation of the Ralph & Russo woman who is strong, powerful and independent, designers Tamara Ralph and Michael Russo of Ralph & Russo told Grazia.

She is an inspirational performer and creative genius, and collaborating with her is always such a fantastic experience. We had so much fun designing these outfits made with Swarovski Elements, all of which were created to provide her with a truly unforgettable stage presence.

In May, Beyonce's trainer, Marco Borges, revealed the secrets behind the singer's weight loss after paparazzi snapped photos of the new mother in a sexy black bathing suit while vacationing in St. Bart's.

We do cardio and plyometric moves like lunges and jumps on and off a bench, Borges told Us Weekly. The 5-foot, 9-inch beauty has been breastfeeding Blue Ivy and is sticking to a strict diet of vegetables and grilled meats. She avoids processed foods. You don't have to eat only celery sticks. Be sensible and exercise constantly, Borges advised.

In March, Beyonce stepped out for her first public appearance since giving birth and fans instantly noticed her amazing weight loss.

That same month, a source told Star magazine that the new mama's weight loss could be attributed to two-a-day workouts with Borges plus a strict diet. Her diet reportedly included protein shakes, egg-white omelets, pineapple chunks, and lots of ice-cold water. Her exercise regime was no less intense. Beyonce and Marco are up at 5 a.m. for a two-hour workout, and they do it again at 5 p.m., the source told Star. They do a mix of cardio, Pilates, plyometrics, yoga and, of course, dance.