1) Read up on How To Remove A Popcorn Ceiling, and consider that.
2) Rip the WHOLE ceiling out and install new Greenboard (and prime TWICE w/Latex-based KILZ, then 2 coats of paint w/a mildewcide in it. Of course, caulk your corners in #1 or #2 ...)
Forget tile since over time its weight will probably cause it to fall. If it makes matter, both 2nd floor bathrooms are pretty-much completely tiled. The ceiling is just plain, old painted.
My best to ya and hope this helps.
Jay J -Moderator
© 2017 Renovate Your World LLC