On May 2, 1970, the Jackson 5 appeared in their first official concert as Motown headliners. They performed at the Civic Auditorium in Philadelphia, Pennsylvania. To promote their new group, Motown took out an ad in the local newspaper, announcing not only the concert, but the time of their incoming flight.
Here's the advertisement;
And here's the Jackson 5 in action, with the vey young adorable Michael already mesmerizing the audience;