I ca n't get the Beatles song ' Day Tripper ' out of my head . Please make it stop . Got a good reason for taking the easy way out , Got a good reason for taking the easy way out - now , She was a day tripper , One way ticket , yeh , It took me so long to find out , and I found out . She 's a big teaser , she took me half the way there , She 's a big teaser , she took me half the way there - now , She was a day tripper , One way ticket , yeh .
According to the above context, choose the best option to answer the following question.
Question: What is this situation called ?
Options:
- An earache
 - An earthworm
 - An earworm
 - An earbug


An earworm