I love all Mettaton's songs, Napstablook's song, and Tem shop which is not a answer :( I just love showtime most though because its catchy and it reminds me strangely of my fave group in Undertale EVERRR! the 3 Blooks :D I just WUV them a lot because they have special personalities. Blooky is the cute and shy one, Mettaton is the fabulous and great dancer one, and the mad dummy (if u did not know the dummy was apart of it) is angry but a cool character. so yeah I really love Showtime :3 and Death by glamour.

umm... I actually switch between Its Showtime and Death by Glamour... right now I feel like Death by Glamour is more catchy because I LOVE M.T.T EX MORE THAN ANY METTATON!! ok... why did I say that in the comment above me... that was a long time ago too..

His Theme so calming and peaceful... I love it~!

Ghost Fight, though... that's a very close second if it's the one I think it is.

:3

I would probably pick Megalovania if it wasn't so overrated.

ALLLLL :OO

>.<