Carey isn’t the only A-lister to call this spread, dubbed Eagle’s Point — due to its highest elevation in the Hamptons — a temporary home. Carrie Underwood stayed in the same house last summer, sources say.

This Water Mill, New York, home is on the market for $20 million — and as a rental for $375,000 from now until Labor Day, said brokers Shawn Elliott and Dylan Eckardt, of Nest Seekers International, who share the exclusive listing. But Carey, who paid more than six figures for her summertime stay, seems to be among the last tenants of the existing property. Located on one of three parcels, it will be torn down once construction starts on a 15,000-square-foot estate that now asks $50 million.

00:0104:017The Water Mill home asks $20 million for sale.Nest Seekers International7One of the bedrooms inside the summery stay.Nest Seekers International7Features include a luxe double-height living space.Nest Seekers International7The chef’s kitchen.Nest Seekers International

We hear Carey brought along an extensive entourage, including her dancer boyfriend Bryan Tanaka.

The 7-acre compound, at 954 Noyac Path, features a total of 8,500 square feet and nine bedrooms across two structures: a main house and a guest house.

Touches include a chef’s kitchen, a movie theater, a gym, a wine cellar and private decks from every bedroom.

7Carey stayed there for two weeks.Getty Images7The million-dollar pool.Nest Seekers International7The property is known as Eagle’s Point.Nest Seekers International

“We showed Mariah a number of homes for rent for her two-week stay in the Hamptons,” Elliott said. “She chose Eagle’s Point because of the insane 280-degree views,” which extend from the exclusive Atlantic Golf Course to Mecox Bay and the ocean.

The main house was once the vacation home of socialite Sunny von Bulow’s daughter, Ala, according to the listing.