Summary of situation  User:ShimShem has taken a dislike to this article, and has tried numerous methods to either get it deleted or its name changed. 
 1) Completely invalid speedy deletion request
 2) Invalid DRV request
 3) Nominated for deletion via AfD, despite the fact that it had passed an AfD this year - in fact the AfD was withdrawn at 6-0 for Keep
 The current AFD here stands at 9-0 for Keep, but despite that, ShimShem has wikilawyered all the way through it - once it became clear that it was going to be kept, they decided a name change would be better...
 4) Changed the name of the band in the article, and was told to take it to talk
 After a brief non-discussion on talk, moved the article anyway, and was reverted

I was originally unsure of the motives of this editor - why they were completely desperate to delete or move this article - until I noted they were interested in Tamil subjects, one of which is M.I.A. (artist), and guessed that they believed that the two could be confused.  Their subsequent creation of the article M I A as a redirect to M.I.A. (artist) proved this, as far as I am concerned.  

As to whether the band is actually called MIA or M.I.A., it differs.  The band itself uses M.I.A. as the heading on their own website, but then uses a combination of both elsewhere.  Since in the case of most sources, this is only likely to be laziness (much as R.E.M. are regularly referred to as REM), and since the article has existed here for a while, and that all the backlinks go to this version, and most of all because we shouldn't let disruptive users get their way, the article should stay here.