By ANTHONY McCART­NEY Sep. 1, 2014 5:38 PM EDT   LOS ANGELES (AP) — The FBI said Mon­day it was address­ing alle­ga­tions that online accounts of sev­er­al celebri­ties, includ­ing Oscar-win­n­er Jen­nifer Lawrence, had been hacked, lead­ing to the post­ing of their…