Ok, I personally think that that is just wrong. Mika was borm Mika Penniman (I think, he said his real name was Mika in an interview). Even if he wasn't, people who knew him called him Mika (eg friends and family) fom before he became famous. Therfore, he should have the right to keep his own name. If he had only adopted the name Mika when he decided to make a record as his fame name, which he didn't, then it would be understandable that the other Mika (from Belgium) would want to sue him.