To commemorate the 10th anniversary of the 2004 Indian Ocean tsunami, Petra Nemcova, a Czech model who survived the disaster by clinging to a palm tree, decided to pull out all the stops for the annual fund-raiser of her school-building charity, the Happy Hearts Fund.

She booked Cipriani 42nd Street, which greeted guests with Bellini cocktails on silver trays. She flew in Sheryl Crow with her band and crew for a 20-minute set. She special-ordered heart-shaped floral centerpieces, heart-shaped chocolate parfaits, heart-shaped tiramisù and, because orange is the charity’s color, an orange carpet rather than a red one. She imported a Swiss auctioneer and handed out orange rulers to serve as auction paddles, playfully threatening to use hers to spank the highest bidder for an Ibiza vacation.

The gala cost $363,413. But the real splurge? Bill Clinton.

The former president of the United States agreed to accept a lifetime achievement award at the June 2014 event after Ms. Nemcova offered a $500,000 contribution to the Bill, Hillary and Chelsea Clinton Foundation. The donation, made late last year after the foundation sent the charity an invoice, amounted to almost a quarter of the evening’s net proceeds — enough to build 10 preschools in Indonesia.

Happy Hearts’ former executive director believes the transaction was a quid pro quo, which rerouted donations intended for a small charity with the concrete mission of rebuilding schools after natural disasters to a large foundation with a broader agenda and a budget 100 times bigger.