Jump on the bandwagon

prʲisʌjidʲinʲitʲsʲʌ kɑ bʌɭʃynstvu pɹɪzɔɪɛdɪnɪtsɪə keɪ bɒlʃɪnstvuː

In Russian Присоединиться к большинству (Prisoyedinit'sya k bol'shinstvu)

This idiom means to join the majority or follow the trend.