Alanis Morissette hit with the lyric "It's like rain on your wedding day" (6)
I believe the answer is:
ironic
(Other definitions for ironic that I've seen before include "Wryly funny" , "Perversely amusing" , "Wryly humorous" , "A form of sarcasm, may sound perverse" , "Type of situation where one is mocked by fate" .)