Jennifer Lawrence  chose a sexy backless Lanvin  dress for the Independent Spirit Awards red carpet in LA today. Her Silver Linings Playbook costar Bradley Cooper  walked the carpet ahead of her and posed with Chris Tucker for the cameras. Jennifer is up for the best female lead honor at this afternoon's show, while Silver Linings is in the running for best feature. The movie is also up for best picture at tomorrow's Oscars, and we'll be watching the action LIVE — join us for a viewing party at 5:30 p.m. ET / 2:30 p.m. PT  for the action!