I've seen people say Telephone is Beyonce's biggest global hit for years now, is this true? If not, what's Bey's biggest global hit?
It might be. Depends how you measure it I guess. You could go by total sales or number of countries it went #1, or just try and measure how well known the song is worldwide, etc. Beyonce has had other global hits like Crazy in Love though.
Not when Halo spent a year on the UK charts even IIWAB had more impressive peaks than Telephone.
Like others have said, Single Ladies, Halo, Crazy In Love and Irreplaceable were all bigger global hits.