Biebs and Hailey are NOT running to the alter. Like, waiting until at least 2019!
However, a second source told TMZ that the "No Brainer" singer and the model's engagement was actually a long time coming.
"Justin's been in love with her for a long time, so this didn't just come from out of the blue," said the insider. The couple who also dated back in 2015, were reportedly together "a number of times -- times the public doesn't know about" over the years.