Whitney Houston tragically died yesterday at the age of 48. And while the cause of death is as yet unknown, it has been reported that the singer ‘partied heavily’ last night. Whitney died at the Beverly Hilton Hotel, where she was staying in order to attend at perform at a pre-Grammys party hosted by Clive Davis. According to TMZ, the star was seen with a large group of friends at the hotel bar on the eve of her death. Sources told the website that the group were drinking and being loud. And the website went on to allege that the singer and her friends stood out because of all the noise they were making, despite the fact that the hotel was abuzz with guests getting ready for the pre-Grammy festivities. A spokesman for the local police department said that emergency services had been called to the hotel at 3.43 this afternoon, arriving minutes later. Officials rushed to the room on the fourth floor where she was staying as a guest, where they found security staff attempting to revive her. Life-saving attempts were unsuccessful, and she was pronounced dead at 3.55pm. According to TMZ, police have sealed off the hotel room where Whitney died and will not be searching it until they have obtained a search warrant. The website reports that their primary interest is to establish whether or not drugs were present in the room. Whitney was spotted looking worse for wear on a night out with friends just two days before her death. The singer had been a guest at the Kelly Price & Friends Unplugged: For The Love Of R&B Grammy Party at Tru Hollywood and had even performed during the night. A witness told Us Weekly at the time that Whitney had appeared ‘wasted’ and ‘moody’ as she exited the night club.