AA vs.KK(suckout?)

[TEKEE]

Midway through $20 buyin(no rebuy)tourney earlier tonight i moved allin from the BB with KK after the UTG raiser made what i thought was a standard raise to my horror he calls & flips over AA! on flop i tell him NH as i knew my goose was cooked low & behold a beautiful king pops up on the river when i see it i type in "WAS THERE EVER ANY DOUBT?" needless to say he was irate.well was there any doubt?LOL
ANY FEEDBACK PLEASE BY THE WAY I WENT ON TO FINISH IN 5th out of 102 entered i was STOKED still am lol