Funny that i read this question today, since a year ago (may 20th, 2015) i had the privilege of going to the Scandal World Tour 2015 [Hello World] Mexico City concert. I was just remembering this.
I am a huge Scandal fan since 2011, and i've been listening to them nonstop ever since. Being a guitar player, i was very fond of Mami in the beginning; after that i developed a massive crush on Rina
Sometime ago i was, like yourself, very sad thinking that the girls would never went on tour to Mexico (where i live). So I almost had a heart attack the moment i saw that a concert in mexico was scheduled on their hello world tour; at that same moment i went to the venue and bought a ticket.
I was soo happy when they came to mexico city, i saw the news online, heard a live radio interview and so on (i think they stayed here 3 days). I read that they really liked mexico, and that they had many cheerished memories of this part of the tour.
Actually you can see many scenes of mexico and the concert on their Scandal Documentary Film [hello world]. I was amazed to see my face when watching the dvd, in the part where they celebrate mami's birthday
also they went shopping the day of the concert to the very same store i do grocery shopping on weekends.
So, for the concert itself, it was one of the most amazing experiences of my life. Not only the music was so great, seeing them so close was something i would never think possible, but the effort the girls put onto everything at their lives was something most bands simply don't do. They spoke all their MC parts in spanish !! Only the part where Mami thanked everyone after wishing her a happy birthday (cake included) was translated.
I think most (if not all) of the people where really happy with the concert. Some came from a very long distance to see Scandal.
I can't believe a year has passed. I really thing they are the best band in the world. Hope they come again to mexico. Of course i would go to their concert. Long live to Scandal.