If Andromeda's central singularity is 25 times the mass of Milky Way's, what'll happen to our stars when the galaxies collide?

The stars will pass right by each other----missing by LIGHT YEARS---------stars are spread out over vast distances. The odds would be millions to one if any collided

THERE IS NO "SINGULARITY" IN ANDROMEDA ... no less that it is 25 times the size of a-n-y-t-h-i-n-g.

I don't know what you mean by "Andromeda's central singularity", so I'll assume that you mean Andromeda galaxy's central black hole. (Just "Andromeda" usually refers to the whole area of the sky, the constellation. "Andromeda's galaxy" refers to the object catalogued as Messier 31 from the Messier catalog.)

Anyway, if you found out that galaxy's mass, then you should have no trouble comparing it to the size and mass of the entire galaxy and figure out it's so small that it won't have a significant effect except for things very very close to it.

Stars are very far apart; the chance of a collision is about 1 in a billion; that being said, between our two galaxies, there’s about 5 to 8 billion stars; so... a couple probably will collide...

https://youtu.be/u4EuqGZKTH4