After reading out a list of the catchiest songs ever, Si reckoned it was missing something... Neil Diamond's 'Sweet Caroline'.
Getting into the grove of this, Si started playing the song and let his dancing skills loose! The rest of the team didn't quite know how to take it...
The top nine earworms according to the American Psychological Association were...
'Bad Romance' by Lady Gaga
'Can't Get You Out Of My Head' by Kylie Minogue
'Don't Stop Believing' by Journey
'Somebody That I Used To Know' by Gotye
'Moves like Jagger' by Maroon 5
'California Gurls' by Katy Perry
'Bohemian Rhapsody' by Queen
'Alejandro' by Lady Gaga
'Poker Face' by Lady Gaga