Summer Madness (Lead song)

"Summer Madness" is the eleventh single by Japanese hip-hop group Lead, released on June 21, 2006, two weeks before their fourth studio album, 4. It failed to break the top ten on Oricon, but charted in the top twenty, taking the weekly ranking of #17, where it remained on the charts for five weeks.

The single contained two B-sides, "Boku ga Tsuki ni Inoru Yoru" and "One", the latter of which became popular enough to be placed on their first compilation albumLead Tracks: Listener's Choice.