The Myles Kelly song Kat danced in a music video on Dance Academy is "Hey Girl" which is actually by Adam Saunders, who plays Myles in the series.
Myles Kelly is a famous pop singer and Kat's boyfriend for half of Season One. They form a relationship after Myles invited her to be in his music video.
Over the summer between first and second year Myles and Kat go on a road trip across Australia surfing at all the beaches and going to as many concerts as possible. Kat breaks up with Myles at the start of Season 2.
Learn more about "Dance Academy" by checking these 13 facts shared by Buzzfeed.com.