Be sang entirely (verses and chorus) by all members?
Not counting ad libs by one of the girls here and there, is it the only song by a girlband to be sang from beginning to end by all the members?

Why is this is news to me

I don't know. It for sure is a HUGE BOP.

I don't know but it's a huge bop Way better than Wannabe in my opinion.

[Pre-Chorus: Scary (All)]
Colors of the world (Spice up your life)
Every boy and every girl (Spice up your life)
People of the world (Spice up your life, aahh)

[Chorus: Sporty]
Slam it to the left (if you're having a good time)
Shake it to the right (if you know that you feel fine)
Chicas to the front (huh huh)
And go round
Slam it to the left (if you're havin' a good time)
Shake it to the right (if you know that you feel fine)
Chicas to the front (huh huh)
Hi-ci-ya! Hold tight!

Plus, they all have their own lines in the bridge.

So no.

IA I don't know any other girl band where they all sang the verses. Queens of unity

How did I not realize this years ago?

I said no adlibs or shouts during the song
not to mention in the bridge they are talking over each other, its not even singing
it is still pretty impressive that they all sing all the verses and chorus together

Right? It's GIRL POWAH

How is this an achievement?

Look up Bananarama, for most of their songs they all sang into the same microphone in unison.

It is unusual but I like it.

Fifth Harmony's Silent Night cover almost has this. It's just the first couple of lines are solos.