Well at least this one is easy! The Princess Bride. It has the best one liners and is quirky and fun. And I really like the song at the end.
I first watched this movie when my son was a baby and movies were one of the few entertainments I could afford. I was immediately charmed by it, and have watched it untold times since.
Like many other PB aficionados, I know most of the words in most of the scenes and can recite the lines along with the actors. I imagine this must be very annoying to PB novices.
The Secret Life of Bebe 
Lovely song. I have never heard it before, so is this the wedding song????
Not sure yet!
Also easy, O Brother, Where Art Thou.
Oddly enough it also has a song at the end, and a few others scattered through.
A rollicking good yarn from the Coen brothrers that, apparently, tips it’s hat to Homers Odyssey, although, as I’m unfamiliar with that particular body of work, I couldn’t say.
Oh, and Rollerball, the original one (1975) with James Caan , not the sorry attempt from 2005
O Brother is a great movie!
Inconceivable!