Which is more famous Mario or Lady Gaga

Your question is debatable depending on the audience you're asking, but arguably Mario is the more popular of the two. Mario is the flagship character of a series spanning from 1981 to modern times, whileas Lady Gaga has only been in the music business since 2008. Mario is also a renowned cartoon character worldwide, whileas Lady Gaga primarily has her popularity in the U.S. Mario is also quite popular in the fact that both his actions and design appeal to many age groups and kinds of people, while Lady Gaga's audience could arguably be a bit more narrow, primarily aimed at the younger generation who have grown up knowing her music.