The pair reached a divorce settlement this passed February and although Katy unfollowed Russell several months ago, almost immediately after their split, he waited until this week to rid her from his timeline.
We guess that means the two are really through with each other for good.
The "Fireworks" singer is definitely moving on. She was spotted locking lips with Florence + the Machine guitarist Robert Ackroyd at Coachella in April.
It's a new world, not only do you have break up in real life you have to break social network ties too!