I used this with some Master students, but it could easily be encorporated into an Advanced class. You can use the video to teach some complex vocab, to start a discussion about music and politics, rhetoric etc. My students seemed genuinely interested to learn a bit about the American political system and they enjoyed the song a lot and found it moving. Barack Obama is competing against Hilary Clinton (wife of Bill) to become the Democrat candidate at the next USA presidential election. A few months ago he gave a speech (called “Yes, we can”) which touched the heart of will.i.am – a rapper from the Black Eyed Peas. Will.i.am turned the speech into a song and invited lots of famous people to join him.
Here is the video:
An article about all this is here at the BBC.
Lyrics / words of the speech are here.
List of celebs on the video and further information from wikipedia here.