• Gisele Bundchen has two reasons to be happy today. Not only did she just have a baby, but less than a month after she closed on the sale of her West 11th Street penthouse, she's managed to find a buyer for her townhouse at 42 Barrow Street, too. The 5,000-square-foot home, which Bundchen bought for $5.8 million in 2005, had been listed for $13.95 million since September. [Cityfile, PDE]
• Entrepreneur David Smilow has found a buyer for his duplex penthouse at 140 Perry Street. The massive 8,100-square-foot spread, which Smilow listed for $19.5 million and took off the market in April, went into contract to sell earlier this week. [Cityfile, PDE]
• Dr. Arthur Agatston, the cardiologist best known for having created the South Beach Diet, and his wife Sari Agatston, have paid $7 million for a 6,400-square-foot mansion in East Hampton. [Newsday]

• Marisa Noel Brown, the daughter of disgraced Fairfield Greenwich Group founder Walter Noel, and her husband Matt, are officially putting their townhouse at 12 East 78th Street on the market. The Indiana limestone–faced manse, which the couple bought for $13.5 million in 2008 and then spent millions renovating, will be listed with Stribling's Patricia Farman-Farmaian for a mere $11.5 million. Quick cash buyers, please. [NYO]
• Mariah Carey and Nick Cannon have reportedly paid "around $7 million" for a 11,750-square-foot mansion in Bel Air, Calif. [Real Estalker]

♦ After briefly listing his fifth-floor "Astor Suite" apartment at the Plaza for $55 million for one day in September and then taking it off the market, Esprit's Jurgen Friedrich has put the 5,000-square-foot spread back on the market for $38 million. [NYP]
♦ David Smilow, the co-founder of TeleBank, which was sold in 2000 to E*Trade for more than $1 billion, has put his duplex penthouse at 140 Perry Street on the market for $19.5 million. Curbed.com has photos and a floor plan here. [Cityfile, Corcoran]
♦ Screenwriter and director James Toback has listed his 15th-floor apartment at the Majestic for $3.75 million. The 2,200-square-foot apartment comes with two bedrooms and a handful of celebrity neighbors including Conan O'Brien. [NYP, BHS]