Anybody know this song?

I was at target and I heard some like random background music and it was a guy singing "We're never lettin' go; no, we're never lettin' go" or something like that. It seemed kinda pop/alternative...actually the voice sounded like Alex Gaskarth to me. But that could possibly just be because I was thinking about All Time Low at the time lol. Anyways, who knows this song? I tried google but it gave me a Jonas Brothers song and I'm pretty sure that wasn't it. Thanks in advance. (: