A few years ago, I read a DC comic that had a multiverse in it and there was a scene that had a whole bunch (four or five) of Supergirls flying in a line formation like the jets at the beginning of this video:
If I remember right, the supergirls were in formation almost mirror image to the image of the planes in the video -- they were all flying facing the right, and the top girl was the most right, the others sliding more left as they went down something like this:
111> 222> 333> 444> 555>
I think that each Supergirl was from another universe. Maybe one of them was Powergirl.
What comic was this?