Madonnas second concert tour supported her third studio album "True Blue" as well as the soundtrack on another album. What was the tour called?

Explanation

The "Who's That Girl World Tour" (1987) is the second concert tour by American singer-songwriter Madonna. It was also her first world tour. The tour supported her third studio album, "True Blue" (1986), as well as the soundtrack "Who's That Girl" (1987). Madonna's 1987 film "Who's That Girl" was a box office failure, but its soundtrack proved to be a commercial success.