Looking on the internet deeply has found these results:

I heard is the most popular phrase on the web.

I've heard 15,800,000 results on the web	I heard 1164,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
I've heard her album would be launched tomorrow, correct too? Anonymous: CalifJim. Anonymous Why do we reword 'would' to 'was going to'�... I hear/I've heard, (the) word is that, rumour/word/legend has it that... Explore Thesaurus. This is the British English definition of from what I hear / from what I've �... I've heard that + (subject + verb). You are letting someone know that you are aware of something or that you have been informed of something that is taking�... Les stimuli qui ont concouru � l'�mergence de � I've heard about � sont multiples et se renouvellent sans cesse. Son existence est inextricablement li�e � la fin�...	I heard you killed your supermodel. I heard because she speaks loudly. I heard you gave Teddy a contract. soon confessed last night. I heard that Burroughs was indiscrete with a customer. I heard that you were offered partnership. I heard Byung I think I heard something outside.

I've heard

15,800,000 results on the web

I heard

1164,000,000 results on the web

More popular!

I've heard her album would be launched tomorrow, correct too? Anonymous: CalifJim. Anonymous Why do we reword 'would' to 'was going to'�...
I hear/I've heard, (the) word is that, rumour/word/legend has it that... Explore Thesaurus. This is the British English definition of from what I hear / from what I've �...
I've heard that + (subject + verb). You are letting someone know that you are aware of something or that you have been informed of something that is taking�...
Les stimuli qui ont concouru � l'�mergence de � I've heard about � sont multiples et se renouvellent sans cesse. Son existence est inextricablement li�e � la fin�...