Today is National High Five Day! To celebrate, we hope you're giving high fives to literally everyone (well, maybe not everyone, but you know what we mean). Of course, every time you use the greeting, you run the chance of being totally denied – which even happens to celebs!
From the Fifth Harmony girls to Ariana Grande, click through the gallery to see the most epic celebrity high five fails, then let us know if you have ever been left hanging in the comments below.
Camila Cabello was a bit too occupied with Austin Mahone to give Lauren Jauregui a high five.