PS3 problem ???? help?

May be...

i was playing GTA 4 on ps3 and in the middle of the game it freezed....so i restarted my PS3 but the game wont load up, and it said " CORRUPTED DATA". does anyone knows how 2 help?

You have to erase your savegame and start over....I believe the game starts and try to autoload your last savegame. Hope this works for you.