This should help soothe the hard feelings over her debacle of a New Year's Eve show: Mariah Carey made few million easy bucks over the weekend—by performing at a wedding. TMZ reports that Carey and Elton John were hired to sing in London at the reception for the granddaughter of Russian billionaire Valery Kogan. The nine-hour party featured Carey crooning "We Belong Together" to the newlyweds, who had requested that she be flown in. Kogan reportedly paid the duo $4.2 million, and the Sun suggests that Carey got about $3 million of that. (More Mariah Carey stories.)