Celebrity relationships form and split all the time. This past summer, fans have been put through a roller coaster of emotions as their favorite celebrity couples broke up and then moved on to date other people.

But, how fast is too fast to start a new relationship after the old one has ended? Of course, everyone has differing opinions about this, but we've found TEN celebrities who moved on extremely quickly.

Some were married to other people just MONTHS after they ended their previous relationship. And some were pregnant before the divorce from their previous marriage was finalized! The timelines here are pretty shocking, yet it just goes to show that sometimes it's hard to keep up with the Hollywood dating and relationship culture.

Click through the slides and let us know which celebrity should have waited longer before moving to a new romance!