The world of celebrities has many wild relationships. But few of them are wilder than Selena Gomez and Justin Bieber.

No one was quite as passionate as these two. No relationship hit the bricks quite like theirs. And for 10 years, no one kept going on-again, off-again like these two.

But how did their relationship start? How did it end? And what are the clues hidden inside Gomez’s latest lyrics? We’ve got the full scoop and hottest goss on lock!

4Keeping the Romance Alive

Knowing now how long their “are they or aren’t they” relationship would last, you might have expected them to take it slow. But Bieber in particular was all about flashy and dramatic romantic gestures.

This started out with things like open smooching at the Billboard Music Awards and the MTV VMAs. It eventually turned into him renting out the entire Staples Center in L.A. in 2011. Why? So they could eat dinner by candlelight on the court and then watch Titanic together!