Maybe they delayed it to re-record it after they saw the fake lyrics Beatfreak posted
I think that Only Girl will be Rude Boy-type of song, sassy, sexy...
Something like this:
I am the only girl, the only girl, the only girl that does it like this
Oh no baby you'll never find a better one than I am
I am the only girl, I'm the only, I'm the only, I'm the only girl that gets down like this, like this, l-l-l-like this,
I am the only girl, the only girl, the only girl in the whole damn world that does it like this
With that hair, everyone would be checking Rihanna out. She doesn't need to overdo it to stay sexy. All she does is walking the read carpet without striking any strange pose and all eyes are set on her, each time. The power of Rihanna.