A.B. Quintanilla and his Kumbia Kings have been steadily evolving with every album.

A.B. Quintanilla and his Kumbia Kings have been steadily evolving with every album. Its latest, "Fuego," includes the Kings' trademark cumbia, but their R&B-tinged material is limited to two tracks ("If You Leave," "Perdóname"). What we find instead is pop, in collaborations with Belinda (the lovely "Quien") and Noel Schajris of Sin Bandera ("Parte de Mi Corazón). The pairings exemplify further development for the Kings, who also include an English cover of "Pass the Dutchie" and a Spanish version of Steely Dan's "Do It Again." The end result is a highly eclectic and daring album. Still, though engaging, it is also cluttered. There's too much going on, and the good—"Na Na Na (Dulce Niña)," "Quién" and title track—get drowned in the din. But if you're patient, good things will come.—LC