In recent weeks the couple, who split in 2015, have been seen partying in Los Angeles and NY.
The video of both the celebs of making out in a park in the NY city went viral.
Justin and Hailey sparked romantic rumors a while ago after they have been spotted in Miami and NYC. The stars continued their PDA spree in Manhattan later that night, kissing in Rockefeller Park as Baldwin sat on Bieber's lap, according to another photo posted by TMZ. However, a recent post on Justin's Instagram did feature her - though partially.
These two briefly dated in 2015.
'Justin and I were friends for a long time, ' she told The Times UK. Everybody knows that at a certain point in time that turned into something else, but that just happens when you're 18, 19.
"But it brought both of us to the realisation that we just work much better as friends", she added.
This rekindling of their romance follows their initial relationship in 2016 - but the pair later split as they "went through a long period of time when [they] weren't friends". "He's somebody I really cherish".
On June 13, a source speaking to PEOPLE said, "He is single and not dating anyone seriously..." He has known Hailey for years - she is very involved in Justin's church. "They seem very close and comfortable together", the source said.
- Cristiano Ronaldo joins Juventus from Real Madrid on four-year deal
- How Raheem Sterling has had a 'fantastic' World Cup, argues Dier
- Thai PM thanks people involved in cave rescue
- Facebook to be fined £500,000 over data breaches
- PGA Tour to bring tournament to Detroit Golf Club in June 2019
- Michael Ondaatje’s The English Patient wins prestigious Golden Man Booker Prize
- Bugatti Chiron Divo lined up as downforce-honed variant
- How to watch the semi-finals
- LONDON FALLING: US Embassy Warns Americans of 'VIOLENT' PROTESTS During Trump Visit
- Eden Hazard still open to Real Madrid move