The girls of the YouTube videos may need to step aside. The most important “Obama girl” is now likely to be talk show host Oprah Winfrey, who has announced she is to hold a fundraiser for Democratic hopeful Barack Obama at her palatial home near Santa Barbara, California, on September 8

Obama already has the support of Hollywood moguls David Geffen and Jeffrey Katzenberg, and Winfrey’s fundraiser will be a chance for him to gain even more California showbiz money. Forbes magazine estimates that Winfrey is worth $1.5 billion. Obama has so far raised over $58 million for his White House bid.