These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Also, "Greatest Love of All," originally by George Benson.
As well as "All the Man I Need", originally by Sister Sledge.
"I'm Every Woman," originally by Chaka Khan.
Ear Worm: "I Wanna Dance With Somebody", "When You Believe", "I'm Every Woman".
"Funny Aneurysm" Moment: All the jokes relating to her drug use and her relationship with Bobby Brown aren't really funny anymore, considering...well...
Also her song "I Will Always Love You" is particularly sad because all of the lyrics seem to relate to her dying, like "So good-bye/Please don't cry /We both know I'm not what you need". The whole song is about her having to leave for an unknown reason.
Epic Movie had a running gag about her and her relationship with Bobby, so much harder to watch now.
In her 'Nothing But Love' World Tour in 2010, she paid tribute to one Michael Jackson, even singing excerpts of "Wanna be Starting Something" and "The Way You Make Me Feel". Two years later and she very much followed in his footsteps.
Just one week before her death, Rifftrax released a trailer for their riff of Twilight: Breaking Dawn Part 1, in which Kevin Murphy tearfully sings "I Will Always Love You."
Signature Songs: "I Will Always Love You", "Saving All My Love for You", "Greatest Love of All". Granted that two of those songs are covers, but still.