"Happy?" is a single from Mudvayne's third album, Lost and Found. It was released in 2005 and is a highly played song on the radio. The song was the theme song of WWE Vengeance 2005 and has been played as a commercial bumper track for The Jim Rome Show. "Happy?" was named both the No. 1 Headbangers Ball Video of 2005 and Billboard Monitor's Active Rock Song of the Year. The song held the No. 1 spot on the Billboard Hot Mainstream Rock Tracks chart for one week, and reached No. 8 on the Hot Modern Rock Tracks chart.