I still don't know what Hilary's team were smoking when they rejected "Boom Clap" and allowed "Chasing The Sun" to be her comeback single.

I mean the song is cute but, even some of the BIBO bonus tracks would have made for a better comeback single. "Belong" is really cute.
From the sound of them, I'd say that "Belong", "Rebel Hearts" and "Outlaw" were all part of the original album with "Chasing The Sun" and "All About You", which is why they're all only bonus tracks. They all have the kind of slight folky-pop vibe to them.