Top 10 favorite movies in which music is central?

Nashville
The Wizard of Oz
This is Spinal Tap
A Hard Day's Night
Allegro non troppo

Though I passed over a couple that might count - Godfather, Run Lola Run

My most favorite film with a lot of singing in it is Lifted starring Uriah Shelton and Dash Mihok.

God bless you and them always!!!

Holly

Wow, that is not gonna be an easy one, however these 10 movies comes to my mind without having to think too hard about it and all of them features a fantastic range of great and memorable selection of songs which is used very creatively and in a way that they make the film or scenes (no matter how small or short they are) even more powerful or emotional.
I also like that they do not end up making the same usual "mistake" as so damn many movies often tend to do, by dragging along those tiredsome and extremely overplayed big super hits everyone have heard thousands of times in far too many films and TV-shows and sadly often in a very uncreative and hasty manner, so that it just end up feeling unpersonal and "cheap".

I do enjoy when the music feels more personal and is there to give a certain extra spark or punch, not just by having it out to be yet another "cool" or "loud" special effect but in a way so that it plays a small but vital part to either the story or its characters, and something which stays with the viewer for a long time. Instead of something that you just end up forgetting within a few seconds afterwards.

Anyway, here are a few really good movies which comes with a fantastic selection of very different but highly memorable set of songs and music and which for me ends up taking the film to a whole new level, starting up with:

Something Wild (1986) 
Jonathan Demme's wild and unpredictable take on the whole 1980s retro romantic screwball genre turned out to be one of the finest and most solid films to combine romance, drama, comedy but also one which made damn sure to never make out the main characters as just another bunch of one-dimensional stereotypes.
By the time it was released, I guess it might have confused many of the audiences, because it starts up in a very colorful and lighthearted fashion, but somewhere along the way Ray Liotta arrives and things go suddenly very dark and the story moves away of similar themed films such as Into the Night (1985), Blind Date (1987) and Who's That Girl? (1987) and before you know it, it feels like it could be a relative to that of David Lynch and his Blue Velvet (1986).

Anyway, what I loved most of the film is how much fun it was to be taking part of this memorable and bumpy ride with Jeff Daniels and the stunning Melanie Griffith along with an impressive collection of great songs and music, which on their own helped create setting a tone for some of the most important scenes in the film.
A great examble is when the two main characters are on visit to a high school reunion party, having a good time and where The Feelies is rockin' it out with an awesome cover of David Bowie's classic, Fame.
However, the mood changes dramatically the very moment when they go into Loveless Love and Liotta steps into the scene.
Then you know you are in for something special.

All in all, a great movie and surely one of the best "hidden" 80s gems along with a stunning set of great and talented artists who appear throught the run.
By the way, here is just a few of the many songs and artists who was featured in the film:
X - The New World (1983), Oingo Boingo - Not My Slave (1987), The Feelies - Loveless Love (1980), The Motels - Total Control (1979), Makgona Tsohle Band & Mahotella Queens - Wozani Mahipi (1973) and The Go-Betweens - Spring Rain (1986)

To be noted, sadly most of these cuts were not to be included on the official soundtrack album release.

A Hard Day's Night

A Clockwork Orange

Easy Rider

The Thin Red Line

That Thing You Do

i fell in love with MARIE ANTOINETTE [Kirsten dunst] BECAUSE of the movies.

Probably stretching "music is central" on a lot of these, not many musicals or music docs I like/I've seen:

Mulholland Dr.
Dead Man
Satantango
The Wayward Cloud
Season of the Devil
Chungking Express
Merry-go-round (1981)
Blow-up
Sweet and Lowdown
A Woman is a Woman