If anyone can help me with this song please, I would greatly appreciate it.

I've heard this song on the radio a few times, but they never say the name to it, and I've tried all sorts of methods to try and find it, but have come up empty, and it's driving me nuts. I usually find songs by lyrics, but the voices to it are a little low for me to read any of it. Anyway, it kind of has a Spanish style to it, there is guitar and trumpet music to it, and the only part of it that I remember is that a group was singing either la or na while the trumpet was following with the rhythm.

From what I can remember, this is how it went, and from number 1 through 4 for the pitch, 1 being the lowest and 4 being the highest

1 la
2 la
3 laaaa

3 la
2 la
1 laaaa

1 la
2 la
3 laaaa
4 laaaa
3 laaaa

1 la
2 la
1 la

2 la
3 la
2 la

if you guys have any ideas of what the song might be, please let me know.