The ex-couple's relationship went south in 2014, and specifics remain a mystery.
Our favorite pop music darlings — from Katy Perry to Sia to Diplo to Demi Lovato — showed off their red carpet-ready best immediately following the awards show ceremony.
The Chainsmokers, Halsey, Justin Bieber + Twenty One Pilots also have spots in the annual mashup.
If expert shade-throwing is what you came for, Taylor Swift has got you covered.
Swift and Harris broke up in June after more than a year of dating, and some messy mud-slinging followed.
'I thought of the concept years ago, when I left Safeway.'
'I made my move, but it was all about you / Now I feel so far removed...' Calvin sings—yes, sings—on the new dance jam.
"For both of us it was the wrong situation. It clearly wasn't right, so it ended."
Sia, Calvin Harris and Rihanna also made big names for themselves.
Demi Lovato and Miley Cyrus are now tattoo twinsies.