Wikipedia
S.S.T. (song)
"S.S.T." is a song by American musician Prince which was recorded and released directly after the impact of 2005's Hurricane Katrina. It was officially released as a digital download by the NPG Music Club on September 3, 2005 and reached number one on the iTunes R&B chart. It was later made available as a CD single through commercial outlets. All proceeds from the recording went to hurricane relief.
The song's title alludes to Sade's 1985 song " The Sweetest Taboo", which is namechecked more than once in the lyrics. "S.S.T." also refers to sea surface temperature, which is used to monitor the threat of hurricanes.
The B-side of the single is the instrumental "Brand New Orleans".