I accidentally liked my crushes photo?

On facebook I was snooping on my friends iPhone and I was on my crushes tags/photo. & like I liked it on accident. I unliked it will it show on his nofication? Like that I even liked it. Or will the nofidcation will disappear?

It wil show on his notification that you liked it but when he clicks on it it will say error or something like that.

The notification will show, but it won't show which picture you liked because you unlinked it afterward.