“99.9 f° is the lead single from Suzanne Vega’s fourth studio album, of the same name. It was produced by Mitchell Froom, her future husband. The song reached #13 on Billboard’s US Modern Rock songs chart, and entered the top 50 of the UK singles chart, peaking at no. 46. The lyrics find Vega attempting to seduce a man with a series of heat- and fever-related metaphors.