How old was Madonna when she went on her first concert tour?

Explanation

"The Virgin Tour" was the debut concert tour by American singer-songwriter Madonna. The tour took place in 1985 and supported her first two studio albums, "Madonna" (1983) and "Like a Virgin" (1984). The tour was initially planned for an international audience, but was restricted within United States and Canada only. The Beastie Boys were the opening act for the tour.