1. Jordin Sparks- Agree with everyone else that she is the class of this group here.
2. Hayden Panettiere- A tiny powerhouse that can give Sparks a run for her money before she'd run out of gas. I've always thought Hayden would be a fierce competitor and, even with her smaller frame and shorter reach, has the brute force and fury wipe the floor with many other celebs!
3. Taylor Swift- Gonna go against the grain here. Not only does she have a figure now as opposed to when she was a super skinny string bean, but I've always thought of her as having a low-key savage mean-streak to her that she skillfully and slyly hides behind her goody-girl pop star image; which if you go by some inside-the-industry rumors might be pretty close to how she really is! The top two girls would still handle her but I think she'd put up a fight and clobber the three weaklings below her. I seem to be in the minority here

4. Phoebe Tonkin- We start getting to the jobbers here for me! She's on the taller side and has an icy appearance to her, but once in the ring I think she'd be very limited and can picture many smaller girls taking her down in lop-sided fashion.
5. Nina Dobrev- Gonna contradict myself here a little and just go on personal preference

She is clearly in shape and is big into yoga as well, but I've always seen her as being pretty wimpy compared to most of the other legitimate catfighters and if anything her flexibly means she could just be bent and contorted into all sorts of embarrassing positions by her stronger opponents! So yeah I'd call Nina a certified jobber.
6. Lily Collins- Obviously! My favorite creampuff of all time

she'd lose against a gust of wind! I've said this many times, but I think even other cupcakes like Ariana Grande or Victoria Justice completely steamroll her with ease. She stands no chance against anybody else in this group (or in any other group)!