LOL. J.Lo can't sing. She has a passable voice, but she is all studio production. In all her career she has never toured. Never. That is unheard of for someone of her level in the music industry.
What's funny to me is as much as I like JLo she's always been mediocre to me as an actress, singer and dancer. Now she's very beautiful and full of life, but I think that she needs to get better acting lessons and focus on developing the craft in which she has a better chance of succeeding.
Her singing was HORRIBLE....WTH!! If I was in the audience I would have thrown my shoe at her.