Alessandra Ambrosio took to Facebook this evening to share pictures of the newest addition to her family, baby Noah. She wrote, "Wanted to give you all a sneak peek of Noah and so thankful to pampers. By taking these pictures we helped out UNICEF and those in need." Alessandra gave birth to her second child with fiancé Jamie Mazur in May. The couple also have their almost-4-year-old daughter, Anja. Alessandra's already back to work after welcoming her son, but another Victoria's Secret model is just starting her journey to motherhood. Marisa Miller is pregnant, joining a long string of expectant VS ladies this year.

Source: Facebook user Alessandra Ambrosio

Jennifer Lopez sported a low-cut swimsuit today at her hotel in Rio de Janeiro. J Lo was spotted splashing in the pool with her twins, Max and Emme, at the Brazilian resort. Jennifer also hopped on a boat with a group of friends, and while she wasn't seen taking a turn wakeboarding like some of the others, she soaked up some sun with Casper Smart in a pair of Dita shades on deck.

J Lo wore a bikini yesterday as she enjoyed some downtime with her kids and boyfriend by the ocean. She's currently on her South American tour, with her next show happening tomorrow night in Rio. Jennifer recently pulled a muscle in her back toting Max and Emme around, but the setback luckily hasn't derailed her Dance Again tour, which Casper helped choreograph.

Blake Lively continued her high-fashion press tour for Savages today. She appeared outside the Late Show's NYC studios before her interview with David Letterman and posed for photos decked out in a white Jenny Packham mini. Just yesterday, Blake was on the West Coast for the LA premiere of Savages. She hit the red carpet wearing a glamorous Zuhair Murad gown. It was a quick turnaround for Blake, who made in to the Big Apple right away. She's handling press before the Oliver Stone-directed picture arrives in theaters next Friday on July 6. The interviewing will continue tomorrow with Blake's stop on Good Morning America.

The Spice Girls reunited in London today to announce the new West End musical Viva Forever!, which will feature many of their hit songs. Victoria Beckham, Melanie Brown, Geri Halliwell, Melanie Chisholm, and Emma Bunton first got together in 1994, and they had years of worldwide fun in their time as a pop group.

To celebrate their next project, we're taking a look back at Baby, Posh, Sporty, Ginger, and Scary's best moments!

Jessica Simpson tweeted a new picture of baby Maxwell this afternoon! Jessica's caption on the photo read "howdy friends," and it's actually the first candid shot of the little one she's shared with her fans and followers. Maxwell Johnson made her People magazine debut at the end of May and hopefully this means Jessica will be sharing more sweet shots of the 2-month-old soon. Since giving birth, Jessica has been focusing on her time as a mom, but she's also been hitting the gym to get back to her prepregnancy figure as part of her work with Weight Watchers.

Emma Stone and Andrew Garfield tackled separate projects on behalf of The Amazing Spider-Man in NYC today. As part of the "Be Amazing" volunteer initiative, Andrew visited with kids at the Albert Shanker School in Queens. He rocked a leather jacket for the appearance, then perched on a stool to talk with the students. Emma, meanwhile, went to Staten Island's Rocco Laurie School and watched the young people work on a project with change called "Common Cents." Emma kicked off her day chatting up their action movie on the Today show, where she lavished praise on her real-life boyfriend, Andrew. The duo will head West soon. Emma and Andrew will attend the LA premiere of The Amazing Spider-Man, which we're covering LIVE! Head back on Thursday night at 9:30 p.m. EDT/6:30 p.m. PDT.