I'ts really easy and nice.. :), Sorry for the grammar errors .. This is because I don't know so much English but I try xD !! .. enjoy! ^^
First .. take your material .. :)
Then take the Hot glue gun and pour in the earring a small amount of glue ..
and paste the earring in the botton .. and you're done! .. xD
Now you have a nice and originals earrings =D!!! ^^