Hi. My favorite band is one direction the Irish boy band and I listen to them ALL day.
Oh i see. Which of their song is the most popular? 
Yes. What Makes You Beautiful is perhaps the one most popular song, but they have many other good songs
What genre of music do they sing?
six "Billboard" Music Awards, seven American Music Awards (including Artist of the Year in 2014 and 2015), and 28 Teen Choice Awards. They have embarked on four world tours. In 2013, they earned an estimated $75 million, becoming the second highest earning celebrity under 30 according to "Forbes". The International Federation of the Phonographic Industry (IFPI) honoured them as the Global Recording Artist of 2013. "Forbes" ranked them as the fourth highest-earning celebrities in the world in 2015,
What Makes You Beautiful
"What Makes You Beautiful" is a song by English-Irish boy band One Direction. It served as their debut single and lead single from their debut studio album, "Up All Night" (2011). Written by Savan Kotecha and producer Rami Yacoub, the song was released by Syco Records on 11 September 2011. The uptempo power pop track features a prominent guitar-based chorus and riff. The middle eight consists of a "na na na" hook while the opening guitar riff