Danny Howard tells the story of the world's youngest superstar DJ - Martin Garrix.
BBC Radio 1
Jessie J talks through the songs that propelled her from her school days to stardom.
Gemma Cairney meets the girls who have relationships with bad boys. (R)
BBC Radio 1Xtra
Alice Levine takes a look at the artists tipped for big things in BBC Music Sound Of 2015.
Semtex heads to Seattle to hang out in the city that is home to Macklemore and Ryan Lewis.