She should keep it upbeat but more important she needs to have some energy on stage, with an amazing outfit and something going on on stage that is interesting. I think it shock people if Mariah did something like she did with Fantasy on Around The World and Homecoming and then have some big vocal momenets with Vision Of Love and AnytimeYou Need A Friend. What I love about Anytime You need A Friend is it goes into the remix perfectly so u get a ballad and an uptempo in one song.