What is the name of this movie I am trying to find?

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When I was a kid I watched this halloween/ child friendly scary film and I can’t find it anywhere.
I don’t know if I imagined the film but all I remember is I think it was about siblings who ended up in a alternate universe where monsters came alive. I believe there was a recreation of Michael Jackson and Thriller. I think they were running through like a sewyer, underground or like cave sort of thing,. But I know for sure the song Monster Mash was played frequently through out because it was this film that I first heard the song.

Not a good description but I’m hoping someone watched it and knows the name. It has been bugging me for a while.
I believe the film could have come out around 2000 to 2006. As I was around 8 – 10 when I watched it.

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Monster mash is a movie similar to this

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