Sentence:  Or to put it another way: could a song end your life? Could just one number, performed <WSD>weedily</WSD> by Keira Knightley at the beginning of this romcom, cause your body to self-combust at the prospect of enduring 90-odd minutes of a movie obsessed with authenticity but as phoney as a Miley Cyrus dance routine? 
Meaning of the word marked with <WSD> tags:  In a weedy manner; feebly.