Is Niall helping Shawn through a tough time?

It looks like Niall Horan and Shawn Mendes have really developed a big bro/little bro friendship! In fact, when Shawn stresses about his career, he turns to Niall. "He gets really nervous and I try to chill him out," Niall reveals of Shawn. "He keeps saying to me, 'I'm so new to this,' and keeps asking me questions. I mean, he's only 18 years old, we all forget that… I went to watch his gig and I was proud of him." Aww, love that.