I will start!
Genre: Bubblegum Rock
What is it: Similar to 'Bubblegum pop' It's just catchy music and lyrics that generally have no real meaning. Thing of the song 'Butterfly' from Dance Dance Revolution, except rock.
Artist: No more Blue Mondays
Genre: Bubblegum Rock
Singles: Smiles, Nothing's wrong, and Idiot-proof
Sound: NMBM mixes emo and bubblegum rock to get catchy music and vocals mixed with emotional music. A real roller coaster of a band.