Can we expect a photoreportage on Iberospherical?

Here's an Ibiza-related question that even Stephen Hawking couldn't have answered: If J-Lo is a bilingual English-Spanish speaker, how come in On the Floor, she pronounces it IbiZa with a zebra zee sound, rather than IbiTHa or IbiSa? (Pitbull also does this.)

Also, where the hell does that vowel sound in the line 'in the cluuuuuurrb' come from?

Ibiza - land of phonetic mystery. And some other stuff.