Whitney Houston has died at age 48 of unknown causes, according to her publicist, who confirmed the sad news. TMZ is reporting that a member of Houston's staff found her unresponsive in her room at the Beverly Hilton hotel, where a police crime lab vehicle was allegedly just seen outside. According to their sources, police responded within minutes, and paramedics attempted CPR before pronouncing the legendary singer dead at 3:55 this afternoon.

Just a few days ago, Houston was spotted leaving a Hollywood nightclub, disheveled, with scratches all over her body. Tragic.

Whitney Houston, superstar of records, films, dies [AP]

Whitney Houston dead at 48 [TMZ]