Nightmare celeb couples: Charlie Sheen and Lindsay Lohan? Justin Bieber and Miley Cyrus?

Calm down. Charlie Sheen is not dating Lindsay Lohan. Nor is Justin Bieber hooking up with Miley Cyrus. In fact, as far as we know, the Bieb is still sending flowers to Selena Gomez.  And, thankfully, the celebrity gods are (somewhat) appeased.

But we dared to go there -- to imagine the worst celebrity pairings possible. And because we're the sharing type, we've compiled them in this handy photo gallery.

Have a look, then let us know who we left out.