I'm looking for a song name or artist....

Hi.
I'm about to get mad to the rest.
I'm looking for a song in Spanish.
A club one.It was a hit.
I think the performer is from Argentina but I'm not sure.
I saw the video only from the concert and it seems to me that it was some kind of hall and not a stadium.
Handsome guy, nice guy. Not Ricky Martin type :)
Short name of the song.
Nice track....