Simplify the following text for a Grade 11 native English-speaking person.
Original: The event is often seen as being dominated by light orchestrated pop songs , known locally as schlager musicâ '' so much so that it is sometimes referred to as Schlagerfestivalen by the Swedish media but other styles of music such as rap , reggae and glam rock have made an appearance since the competition 's expansion .
Simplified: Light orchestrated pop songs , known locally as schlager music , are so prevalent that the festival is sometimes referred to as Schlagerfestivalen ( `` The schlager festival '' ) by the Swedish media . However , other styles of music such as rap , reggae , and glam rock have made an appearance since the event 's expansion .