Roar, Locked Out Of Heaven, and Just Give Me A Reason were songs by pop stars played on Triple A. JGMAR in particular continues to get a lot of spins to this day, perhaps because of Nate Reuss being on the track (Fun. is a Triple A staple)
Happy is for sure gonna smash on radio. I think it's kinda annoying after a few plays, but it's just an overall feel good song with relatable lyrics. I mean who doesn't wanna be happy, as corny as that sounds?