I wonder how else I can put that "something is getting popular". Can anyone help?
You could say something is “becoming a household name.”
house·hold name (also house·hold word)
• n. a person or thing that is well known by the public
I'd like to sell gazillions of books and become a household name.
Source: “household name.” The Oxford Pocket Dictionary of Current English. 2009.
Retrieved March 18, 2014 from Encyclopedia.com
It's getting noticed; becoming fashionable; climbing the charts; it's crowd pleasing; people are favoring it; it has caught on; it has gone viral (that's a new one, and I like it a lot); it's leading the way; it's becoming very in-demand; people are loving it.
This a great place to use a Thesaurus. You can probably find exactly what you are trying to say.
There are many ways. A few of them are..
something is all the rage these days.
something is trending these days.
something is skyrocketing (but use this with caution).
For a more street-slangy idiom, try "[Blank] is blowing up"
This option is listed in the Urban Dictionary
"Catching on" is an old favorite.
catch on (BECOME POPULAR)
to become fashionable or popular:
Why did the electronic gadget catch on so fast?