Here is a list of the songs found on ZIN 34 along with any YouTube videos I could find. Those noted as Zumba Fitness Originals are likely not available on iTunes but most others should be there if you search a bit.
El Amor, El Amor (Merengue) – Zumba Fitness Original
Cali Aji (Salsa) – Grupo Niche
Caliente (Reggateon) – Barbero 507
Hey Pachuco! (Swing) – Royal Crown Revue
Mambo (Rumba Flamenca) – Bandoleros
La Nina Fresa (Quebradita) – Banda Zeta
http://www.youtube.com/watch?v=i_YexVAD9xY
Mi Alma Se Muere (Hip-Hop) – Fuego ft Pitbull & Omega
Mi Vecina (Cumbia/Bachata/Reggaeton) – Zumba Fitness Original
El Amor (Cumbia/Merengue)