Harry Styles from One Direction got hit in the crotch by a shoe while he was on stage the other night . . . and he went down hard.  Apparently it was an accident.  A 14-year-old girl has come forward and apologized for it.  (--She says she didn't mean to hurt him . . . she just wanted something of hers to touch Harry.  She got thrown out of the show temporarily.  But the band brought her back in . . . and they gave her shoes back too.  Homer Simpson loved it!