Desperate for Spanish Traslation

I'm in dire need to have some lyrics translated to Spanish. This is what I have, but I need to make sure it's accurate and double check the pronunciation. Thanks so much!

ENGLISH
O come let us worship
Let us worship, let us worship
O come let us worship
Let us worship Christ our Lord

SPANISH
O vienen a alabar-Lo
Alabar-Lo, Alabar-Lo
O vienen a alabar-lo
Alabanza al Senhor!

or should it be...

O vienen alabemos
Alabemos, alabemos
O vienen alabemos
Alabemos al Senor?


I need a pretty quick turn aoround on this, so any help you can give is most welcome. Thanks!

in my opinion and in this context, alabar means to praise rather than worship, so alabar is ok. on the last line only...I would change as follows:


O come let us worship - vengan, oremos ( or rezemos)
Let us worship, let us worship - oremos, oremos
O come let us worship - vengan, oremos
Let us worship Christ our Lord - alabemos (or adoremos) a Cristo nuestro Señor