From Sun-Times Reporter Maudlyne Iheirika:
In between election results, the huge screens ran montage videos of Obama on the campaign trail. Laughter erupted at the snippet of the President singing Al Green.
At a public event earlier in the campaign, Obama sang a snippet of "Let's Stay Together."
In a Saturday Obama rally in Milwaukee, rock superstar Katy Perry opened her short set with a cover of the song.
Here's the Obama video.