Who or what is known as 'the dominos'?

Based on the clue 'ocular act that sends a signal', what is the answer? Which performer is associated with 'ray'? Based on the clue 'shows youre in this state perhaps you think your...', what is the answer? Which performer is associated with 'tennille'? What does this describe: the e street band? Who or what is known as 'the heartbreakers'? Who or what is known as 'the papas'? What does this describe: the silver bullet band?