Correct spellings for 1999S
- 1990s Hip hop music experienced a surge in popularity during the 1990s.
If you intended to refer to the decade between 1990 and 1999, the correct way to write it is 1990s. The addition of the "'s" after 1999 is unnecessary. Using "1999s" could be misleading, as it implies multiple occurrences of the year 1999.
