Jennifer Hudson serenaded Barack and Michelle Obama with a grooving rendition of Al Green's "Let's Stay Together" during the first couple's dance at last night's inaugural ball – after, of course, the President toasted and introduced his "better half." Hudson's song selection was fitting: It was just about a year ago that Obama broke into an impromptu rendition rendition of Green's hit during a fundraiser in New York City. Yesterday's inauguration festivities were packed with other great musical moments like Beyoncé's stunning performance of the national anthem, James Taylor singing "America the Beautiful" and Alicia Keys tweaking "Girl on Fire" to pay tribute to President Obama.