oooo-ta-da
although i NEVER say 'oooo'
its more of a 'oouh' as you are NOT rounding your lips.

I find it incredibly disrespectful when people pronounce it You-ta-da
That's not her name
So don't call her that

I've always pronounced it oooo-ta-da.

Oooo-ta-da

Ooo tada

Oooo-tada :D It is Japanese, after all ~~~ ^^

Oooo-ta-da