If the voice is familiar, but the face isn't, it's because both belong to Leah Kauffman. She voiced the original 2007 Obama Girl played by Amber Lee Ettinger, whose Milli Vanilli lip-sync is now being fronted by anti-Obama SuperPac ads.
Leah wants you to know that the new song "comes from a place of sincerity." Or maybe she just wants Barack Obama to know. She's just as happy if you have a crush on Mitt.
Of course, these days lots of other people are crushing on Barack Obama.