"She's a very good friend of Nancy Pelosi and she wanted to celebrate the first female speaker of the house," Streisand publicist Dick Guttman said.
The 120 invited guests paid up to $50,000 a couple to attend Thursday night's dinner party inside a large white tent erected on the Point Dume property. The fundraiser was to increase the Democrat majority in the House of Representatives in the 2008 elections, Guttman said.
It was the first fundraiser at Streisand's home since a 1986 concert that raised $1.2 million for Democrats, he said.
At the Streisand dinner were Eva Longoria, Melissa Etheridge and Tammy Michaels, David Foster, Kenny G, Josh Groban, Marilyn and Alan Bergman, Amy Brenneman, J.J. Abrams, Dick Van Dyke, Nita Whitaker and Norman Lear.
Also on hand were Democrat members of congress, including U.S. Reps. Hilda Solis, Chris Van Hollen, Xavier Becerra, Loretta Sanchez, Debbie Wasserman Schultz, Brad Sherman and Henry Waxman.