Complex sentence: After making a cover to Eminem's song Slim Shadey by using an Ipod app, the American keyboard player Jordan Rudess from the Progressive Metal band Dream Theater joined them for a couple of videos and asked Eyal and Ray to join him on his tour.
Split into simpler sentences: After making a cover to Eminem's song Slim Shadey by using an Ipod app, they were joined by the American keyboard player Jordan Rudess from the Progressive Metal band Dream Theater for a couple of videos. Rudess asked Eyal and Ray to join him on his tour.