Supergirl Group Shot

[Super Monkey]

Can you name them all?

[Uncle Mxy]

They're all Cylons.

Seriously, are they all different people, or just different costumes?

[Super Monkey]

two are the same person, the rest are different people

[Michel Weisnor]

They're all Cylons.

And they have a plan. 




From Left to Right

Peter David "Silver Age" Supergirl, Matrix Supergirl , Bronze Age Supergirl, Current Supergirl, Peter David Supergirl, Power Girl, Crisis Supergirl. 

Ed Benes' artwork 

[Super Monkey]

wrong...

The answer is this:

lower left side, with the shorter hair is the Magical Super-Girl from the 1958
Above her is the Iron Age Matrix Supergirl
The hot pants one is of course the Bronze Age Supergirl from the 1970's (Earth-1 Superman's cousin) 
The one upfront is the current Mercury Age Supergirl
The one in the White shirt is Peter David's Supergirl
Behind her is Powergirl (Earth-2 Superman's cousin)
In the far right is of course, is the pre-crisis Supergirl from the mid-1980's in her Crisis uniform.

[Great Rao]

Beppo, you didn't wait to give anyone else a chance!

[Super Monkey]

LOL!

I thought it was too easy, sadly they missed the Golden Age Supergirl, but everyone always forgets her.

http://superman.nu/wiki/index.php/Lucy_Regent

[Uncle Mxy]

Peter David "Silver Age" Supergirl, Matrix Supergirl , Bronze Age Supergirl, Current Supergirl, Peter David Supergirl, Power Girl, Crisis Supergirl. 

Ed Benes' artwork 

This is basically what I thought, and got Kara Zor-El x4 (silver age, bronze age, crisis, and post-IC), Power Chest, Matrix Supergirl (either x1 or x2, depending on how you squint at her merger to PAD Supergirl), and perhaps Kara In-Ze.  I knew about the other two pre-Kara Supergirls, but I didn't think that was where Benes was going here.  And I was all prepared to make a snark comment about how the Superman was really Supergirl disguised as a guy (Matrix Supergirl x3), but Easter took me over.