Baby songs

I was tuning in to Yahoo!'s Launchcast Radio when I realized that I was listening to the nth song that has the word "baby" in it. Think about it, Britney Spears' first hit has that word; the word is commonly heard in B-grade sex scenes on telly ("Oh baaaaby!" although I cannot think of anything that's more of a turn-off). I've got the following definition from Encarta:

***

baby
ba·by [ báybee ]

noun (plural ba·bies)

1. very young child: a very young child who is not yet able to walk or talk

2. unborn child: a child that is still in the womb

3. childish person: somebody who behaves childishly or is overly dependent on others

4. youngest member: the youngest member of a family or group the baby of the team

5. immature animal: a very young animal

6. term of endearment: an affectionate term of endearment, especially for a woman (slang) (sometimes considered offensive)

7. something regarded with affection or pride: something or somebody regarded with affection, pride, or admiration (slang)

***

So, which definition(s) do the singers, or more aptly, the songwriters (since singers nowadays seldom have the composing talent) adhere to? My guess would be 6. for Hip-Hop and R&B genres such as the following:

Baby Bash - Baby I'm Back
Fabolous - Baby (Radio Version)

For girls who like to pretend they are adults, it would be 1-5 (I have yet to hear of anyone referring to no. 2 though I think it would make an interesting blog to try to come up with one). One example of such song would be from 13-year-old Jojo's Baby It's You. Here's an excerpt from the song:

"It’s not by what you got, I know you got a lot
No matter what you do, you always gettin’ hot
It's you... it's you ...
Baby, all I want is you, yeah"

Babies (no.1)! What do they think they know at that age? As someone once told me, "their pubes are not even visible yet!".