On Diamond Hoo Ha, Supergrass has done what is possibly a first for a British band: it has shifted its sound from British rock of the ’60s to mimicking American rock of the ’70s. The title track sets the tone for the big-bottomed, large stage sound that is the driving force for the record. The raunchy guitar riffs would be just as well suited to ’80s groups taking their cues from Aerosmith. “Bad Blood” follows closely with a high kicking chorus that, with its rolls of thumping drums, competes with the best of adult-acceptable anthemic rock. “Ghost of a Friend” and “Whiskey and Green Tea” follow this stadium style with a touch of cock rock that is delivered with no trace of irony. Slightly slower numbers, such as “When I Needed You,” have a blatant arena ballad energy that is begging for a touch of British sarcasm. (Lily Moayeri)