Haley Johnson is beautiful, and has a nice breezy style. I think she seems very relatable, and like an indie type that the audience might actually become attached to.
I think being in an a capella group is good training for the show, because you learn about arranging, so that could serve her well on the show as well. I think she has potential to do really well on the show.
Cover of Sir Greendown
Cover of Dreams
Cover of Rolling in the Deep
Cover of Lets Give them Something to Talk About