I would just say whatever pops into my mind (but nothing inopprobient < (bad spelling)).
That awkward moment when you can't think anything to say to your paborito celeb and they're just standing there staring at you like -_- (waiting for you to say something, basically) and you're like," oh crap!" and you realize you just sinabi that out loud and you're like 0,0 and they're like 0_0 and they yell,"SERCURITY!"
Since I know him so well, I wouldn't spend my time saying " I pag-ibig you" ( although its true) but I would introduce myself and start a conversation about something he likes like Morphe from X-Men so he wouldn't just send me away like his other crazy fans.!@#$%^&*
Wow what a nice thought. :) After inevitably crying and probably being in complete hysterics (he's supposed to be dead?!) I think I would tell him how much he's influenced my life and that I'd pag-ibig to get to know him and be his friend! I'd try and be super chill and calm, which honestly I don't think i'd be able to do :p But I would just ask how he was and I'd like to ask him about his araw and about him rather than losing control and professing my pag-ibig for him over and over and probably asking him to marry me or something... xD I don't know, it's an overwhelming situation to think about lol.
I would probably say a perverted thing because I'm just pervy when it comes to Michael. But to resist the urge I would say "You are just the sweetest thing I've ever seen." Then introduce myself. Might get convo btween us if he blushes.