Formed in 2008, they quickly grew their fanbase by playing venues in their hometown of Las Vegas. Apparently, their synth-rock vibes were enough for people to talk about them to get them Billboard Awards, Teen Choice Awards, and MTV Music Video Awards.
Maroon 5
This one is probably not so unpopular... A lot of people seem to hate Maroon 5 as a band. Unfortunately, it seems like they have the pop music formula down to a science because they always seem to have a banger hitting the charts. As bad of a song as "Moves Like Jagger" was, it was never not playing on a radio station.