Buster Moon: Music and lights bring magic to life.
Buster Moon: Why aren't you rehearsing?
Frog: I'm through! They said I'm an intolerable egomaniac. I don't even know what that means.
Gunter: This stage is about to explode with major piggy power.
Buster Moon: When you've reached rock bottom, there's only one way to go, and that's up.
Answer: It would have to do with paying royalties to the artists if the songs were included on the soundtrack album. The artists would be paid a one-time flat fee for their songs to be used in the movies or the trailers, but for albums being sold would mean some of the profits would have go to the artists. The movie studio can make just as much on the soundtrack album without certain songs being included. Regarding the title, it may be the artist wanted it changed for some reason, or the filmmakers felt it didn't fit in.
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