Definitions are as follows:-
Cheesy= Hackneyed and obviously sentimental.
-‘an album of cheesy pop hits’
(of a smile) exaggerated and likely to be insincere.
--‘a cheesy grin’.
Corny (informal)
Trite, banal, or mawkishly sentimental.
--‘it sounds corny, but as soon as I saw her I knew she was...