He'll be joined by Bill Cosby, Colin Quinn, Will Ferrell and George Wallace October 8 at Carnegie Hall for "Stand-up for New York, " with proceeds going to the Twin Towers Fund and the New York Police and Fire Widow and Children Benefit Fund.

CNN: Celebrities pitch in to help

"To this day I still hear my boys crying out, yelling for Daddy, when they were told the news, " says Jackie Califano, the widow of a New York police officer killed when a suspected drowsy driver plowed into his parked cruiser in 2011.

WSJ: Drowsy driving remains an elusive highway dilemma

Lawrence is the best-actress favorite at Sunday's Oscars for her role as a young widow in a shaky new relationship with a man fresh from a mental hospital.

NPR: 'Silver Linings' Leads Spirit Awards With 4 Prizes