What is referred to by 'cornflowers cornflower shirts'?

What is referred to by 'corner header bicycle'? Based on the clue 'cornflake girl who wrote a song in which humpty du...', what is the answer? Based on the clue 'cornflower blue is the most prized color of this g...', what is the answer? What is referred to by 'cornflower cerulean periwinkle'? Which performer is associated with 'cornhusker'? What is referred to by 'corniche silver shadow'? What is associated with: corning made glass tough enough for windows on these current vehicles to re enter our atmosphe… Based on the clue 'cornish pasties named for this english county ofte...', what is the answer?