So of course, people have been wondering what Shawn thinks about his rumoured ex-bae's engagement.
Shawn's just opened up about it, and it turns out that he's actually very happy for the two of them! He revealed that he texted Hailey the day she got engaged.
And he only had good things to say about Justin, who he also revealed was a massive influence on him growing up.
Aww! Let's hope that Shawn gets an invite to the wedding!