Hispanic? Music in Rue St.Cathrine Montreal

[kml_flashembed movie="http://www.youtube.com/v/-mjztU7wcHg" width="425" height="344" allowfullscreen="true" fvars="fs=1" /]

I saw this on Feb 15 2009 On St.Cathrine Street, I really enjoyed the music and the atmosphere they created, anyone know what the name of the song or beat they are playing? Which this happened more often!