Here's the version of the song used in the popular Tik Tok meme 

e|----6-9-6-9-6-9----11--------------------9------------------------------------------------------9----9--|| 
B|----------------------11--9------9--11---------11---9------9---11--9----9--11--9---11--11----11---11----|| 
G|------------------------------11------------------------11-----------11----------11-------11------------|| 
D|--------------------------------------------------------------------------------------------------------|| 
A|--------------------------------------------------------------------------------------------------------|| 
E|--------------------------------------------------------------------------------------------------------|| 

If you want to repeat it, then cut out the 6-9-6-9-6-9 when you are repeating it.