on again

Over time, their potent mentor-mentee relationship evolved into a passionate on-again, off-again love affair.

No word yet if her on-again-off-again boyfriend, Justin Bieber (who is also an NEO ambassador) will be at the show as well.

They may, however, involve those with whom you are on-again-off-again.

The 24-year-old Buffalo native had a "date" that night, but she wouldn't tell her on-again, off-again boyfriend with whom.

Morton depicts Angelina's relationship with her brother, James, at the time an aspiring director, as close but on-again-off-again.