"Try a Little Tenderness" is a song that reels you in. It builds up over the course of the whole song, adding instruments and percussion along the way until it reaches its peak with a full band and a vocalist reaching unintelligible emotion. More than anything, it's a show stopping tune that can be the highlight of a film.
Here's the man whose version of this song sparked countless iterations, Mr. Otis Redding (about :30 in):
And some film highlights featuring the song.
Paul Giamatti and Andre Braugher in Duets (2000):
The band from The Commitments (1991) at about 2:35. And yeah, that is Glen Hansard on the guitar:
And last is my absolute favorite--Jon Cryer sliding into the record store in Pretty in Pink (1986):