OK, I did some research and the first song on MX's mini is co-composed by Martin Hoberg Hedegaard, a guy who released the original version of Shinee's Love Like Oxygen. So it might be a cover from his only album from 2008, the same one the original Love Like Oxygen was on... And seeing how he wrote it on his own it should be a ballada.
But he made a comeback to the music world this year with a whole new sound (very Years&Years/britpop), so maybe he wrote something for them. Random but not impossible. And definitely better than o LLO like sing from 2008.
Then you have Mafly who worked with SM and did Taeyeon Stress, SNSD Bend Your Knee If You Can, TiTieS Adrenaline.
And HyukShin did SNSD We Got A Boy (for 9 thirsty bitches)
Y'all do way too much on Ailee. I guess the girls saying Crazy In Love demos being 75% of her discography haven't heard one single song from her album.
And I didn't even go on Letting Go ft Amber which was THE SONG.
Lord, if only my western faves' fans are that dedicated. 
