Alicia Keys, Brad Paisley, Fun., Stevie Wonder and Soundgarden were among the recording artists who performed at the inaugural balls in Washington. President Barack Obama and wife Michelle attended two celebrations Monday night, marking the start of his second term. First up was the Commander-in-Chief's ball for military families, followed by a second party, which was open to the public and attended by thousands. The first couple danced to Jennifer Hudson's rendition of "Let's Stay Together," then enjoyed the musical performances along with their guests.