Context: 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 .

Question: What is this situation called ?
Options:
0. An earache
1. An earthworm
2. An earworm
3. An earbug
Answer: 2