What's the Staind song with a harmonic sounding lead guitar line underneath the riff?

This song was played at a live concert last night at Big Day Out in SPAC. The song was extremely heavy for Staind and I really liked it, so I'm just wondering what the name of the song is. The riff was really fat and heavy, with a really high pitched lead line that sound like harmonic notes live. If any one could help it would be greatly appreciated.