on the bandwagon
to do or join something because many others are doing it
Everybody in our company is on the bandwagon to eliminate smoking in the workplace.

[TahlilGaran] English Idioms Dictionary ▲

on the bandwagon
adj. phr., informal In or into the newest popular group or activity; in or into something you join just because many others are joining it.
■ Often used after "climb", "get", or "jump".
When all George's friends decided to vote for Bill, George climbed on the bandwagon too. See: JUMP ON THE BANDWAGON.

[TahlilGaran] English Idioms Dictionary ▲