 "18 Carat Love Affair" was a version of "Sulk"'s closing instrumental track "nothinginsomethingparticular" with added vocals, while "Love Hangover" was a cover of Diana Ross's 1975 hit single.Problems started to surface within the group the following month when they began rehearsals with a nine-piece band for an upcoming tour of the USA and Canada to promote the forthcoming release of "Sulk" in North America.The demands placed on Mackenzie's voice caused him to develop pharyngitis, resulting in the cancellation of a string of August concert dates across the UK, including three planned headline shows at the Edinburgh Festival.