I dunno why Super Bowl Halftime is so special for many singers since it is essentially a sports event. Maybe, an exposure for them.
But wait, let me check the reasons of these artists.
Adele- I understand her. Super Bowl performances are often over-produced and electrifying. Adele is more of an intimate performer.
Jay-Z- He sounds hypocrite for saying that. Her wife Beyonce performed for two consecutive years, and from the past.
Pink- She declined but performed in an instance. How's that?