Aerosmith took to the streets of Boston Monday to hype their new CD, playing a 45-minute, hits-heavy set outside the Allston apartment they once called home.

Looking remarkably spry for five guys in their 60s, the band played on a flatbed truck set up in front of 1325 Commonwealth Ave., a onetime crash pad where Aerosmith wrote some of their earliest songs. The carefully stage-managed PR stunt — the band arrived on a duck boat — drew thousands of fans, some of whom arrived shortly after dawn to stake out a spot.