What's your favorite Whitney Houston song?

Fans are still reeling over the passing of pop superstar Whitney Houston on Saturday at the much-too-young age of 48 ... and the circumstances around her death keep getting stranger.

TMZ reports that multiple medicine bottles were found in Houston's hotel room, including ibuprofen, Xanax (an anti-depressant), Midol and Amoxicillin (for treating bacterial infections).

Houston's body was found in the bathtub at the Beverly Hilton Hotel, just hours before she was supposed to appear at a pre-Grammy gala. A law enforcement official told FoxNews.com that it may have been a lethal combination of alcohol and prescription drugs that killed the singer.

SODAHEAD SLIDESHOW: What's your favorite Whitney Houston song? 

Houston had been seen at several events leading up to the Grammys with her 18-year-old daughter, Bobbi Kristina Brown, from her marriage to ex-husband Bobby Brown. While some reports say Houston was looking disheveled, partying and behaving erratically, others say there was no sign of impending trouble on the set of her upcoming film, a remake of the 1970s release "Sparkle" with "American Idol" winner Jordin Sparks.

"There was no evidence in working with her on 'Sparkle' that there was any struggle in her life," Bishop T.D. Jakes, a Texas minister and "Sparkle" producer, told The Associated Press. "She just left a deep impression on everybody." In November, the singer told "Access Hollywood" that she had "matured."

"There'll be the ups and downs and all-arounds. Your belief and faith and determination (is what keep me going)... it is a blessing I have a mother that is very strong and family that constantly tell me they love me."

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Houston's tragic death got us reminiscing about some of her biggest hits from the '80s and '90s. From her inspiring 1986 ballad "Greatest Love of All" to her signature cover of Dolly Parton's "I Will Always Love You," let us know: What's your favorite Whitney Houston song?