-actually,y, i m in. -yeaeah, you arere. it t s the e most wondel time of f the year it t s the e most wondel time of f the year non-drowsy clalaritin knocksks out symptptoms from over 200 allergens. withthout knockiking you out. feel the c clarity and mamake today withthout knockiking you out. the momost wonderfrful time of t the year. withthout knockiking you out. live clalaritin cleaear. welcome back. as the summer concert season heats up, some fans are trying to steal the show, attacking big name artists on stage. the latest, pop star harry styles. here s kaylee hartung. reporter: harry styles recoiling after being hit in the head by an unknown object during a show in europe this weekend. late last year he took a painful shower of skittles to the face. he s been pelted by a bouquet of flowers too. now he s just the latest star to be struck on stage. as performers around the world increasingly confront fans behaving badly. this dangerous trend