In Winx ClubEdit
Jason Queen made his first appearance while Musa was performing with Andy's Band at the Frutti Music Bar in episode eight. He noticed her talent and gave her his card, offering to make a demo of her singing. Musa became very excited about this, but this caused major problems with Riven. His jealousy at the recording studio insulted Musa, causing her to break up with him. She makes the comment to Flora that Jason is everything she needs, and it has officially ended between her and Riven. Musa thought that Jason returned her feelings and became devastated upon being asked to sing at his wedding. But despite this, she agreed to it anyway.
On Sora's TeamEdit
When he met Marceline and saw her talent, he joins the team and produces other songs from each musical member to make them famous.