What does F81 stand for?

The remainder of the year should also prove successful, as new albums are expected from such multi-platinum artists as 98 Degrees, Elton John, Godsmack, Lil' Wayne, Sister Hazel, Juvenile, Kathie Lee and Monifah, as well as from such emerging artists as Factory 81, Sticky Fingaz, Ramsquad, South Park Mexican, Allen Iverson and Killing Heidi, among many others.