It was the strangest thing to watch the show on the monitors because it felt like I was watching television but the musical accompaniment was obviously live. However, none of that really mattered once Stevie Wonder came on. Seriously, this man is amazing.
The show was free to all who signed up with Global Citizen. This organization is working to bring a collective effort towards ending extreme poverty in the world. This is done by harnessing online connectivity and action through articles, links to petitions and NGOs and also facilitating online donations to these organizations.
You can read more about the festival here and here. You can sign up with Global Citizen here and if you're interested, the footage from the concert is here.