Notice how unaware she is to the media who creep in to record her spontaneous expression of joy, of hope; she turns and is startled by their proximity. That almost stops her but then those around her offer encouragement: "Vas-y!"
A beautiful moment.
PS: In this tweet the singer is identified as Emel Mathlouti, a Tunisian activist and singer.
Update: More about Emel Mathlouti including this, where her version of Baez' song commemorating Sacco and Vanzetti is played over violent, raw and rough footage of recent protests in Tunisia.
